diff --git a/Makefile b/Makefile
index 5d044cf..d34cf5d 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ export GOPATH
 
 # Only set PROTOC_VER if it has an empty value.
 ifeq (,$(strip $(PROTOC_VER)))
-PROTOC_VER := 3.9.1
+PROTOC_VER := 3.14.0
 endif
 
 PROTOC_OS := $(shell uname -s)
@@ -36,14 +36,16 @@ endif
 
 PROTOC := ./protoc
 PROTOC_ZIP := protoc-$(PROTOC_VER)-$(PROTOC_OS)-$(PROTOC_ARCH).zip
-PROTOC_URL := https://github.com/google/protobuf/releases/download/v$(PROTOC_VER)/$(PROTOC_ZIP)
+PROTOC_URL := https://github.com/protocolbuffers/protobuf/releases/download/v$(PROTOC_VER)/$(PROTOC_ZIP)
 PROTOC_TMP_DIR := .protoc
 PROTOC_TMP_BIN := $(PROTOC_TMP_DIR)/bin/protoc
+PROTOC_TMP_INC := $(PROTOC_TMP_DIR)/include
 
 $(PROTOC):
 	-mkdir -p "$(PROTOC_TMP_DIR)" && \
 	  curl -L $(PROTOC_URL) -o "$(PROTOC_TMP_DIR)/$(PROTOC_ZIP)" && \
-	  unzip "$(PROTOC_TMP_DIR)/$(PROTOC_ZIP)" -d "$(PROTOC_TMP_DIR)" && \
+	  unzip -o "$(PROTOC_TMP_DIR)/$(PROTOC_ZIP)" -d "$(PROTOC_TMP_DIR)" && \
+	  unzip -o "$(PROTOC_TMP_DIR)/$(PROTOC_ZIP)" -d "$(PROTOC_TMP_INC)/*" && \
 	  chmod 0755 "$(PROTOC_TMP_BIN)" && \
 	  cp -f "$(PROTOC_TMP_BIN)" "$@"
 	stat "$@" > /dev/null 2>&1
@@ -77,7 +79,7 @@ $(PROTOC_GEN_GO):
 # for protoc-gen-go
 PROTOC_GEN_GO_JSON_PKG := github.com/mitchellh/protoc-gen-go-json
 PROTOC_GEN_GO_JSON := protoc-gen-go-json
-$(PROTOC_GEN_GO_JSON): PROTOC_GEN_GO_JSON_VERSION := v1.0.0
+$(PROTOC_GEN_GO_JSON): PROTOC_GEN_GO_JSON_VERSION := v1.1.0
 $(PROTOC_GEN_GO_JSON):
 	mkdir -p $(dir $(GOPATH)/src/$(PROTOC_GEN_GO_JSON_PKG))
 	test -d $(GOPATH)/src/$(PROTOC_GEN_GO_JSON_PKG)/.git || git clone https://$(PROTOC_GEN_GO_JSON_PKG) $(GOPATH)/src/$(PROTOC_GEN_GO_JSON_PKG)
@@ -170,7 +172,7 @@ $(COSI_GO_TMP): GO_OUT := plugins=grpc
 $(COSI_GO_TMP): GO_OUT := $(GO_OUT),Mgoogle/protobuf/descriptor.proto=github.com/golang/protobuf/protoc-gen-go/descriptor
 $(COSI_GO_TMP): GO_OUT := $(GO_OUT),Mgoogle/protobuf/wrappers.proto=$(PTYPES_PKG)/wrappers
 $(COSI_GO_TMP): GO_OUT := $(GO_OUT):"$(HERE)/$(COSI_BUILD)"
-$(COSI_GO_TMP): GO_JSON_OUT := emit_defaults
+$(COSI_GO_TMP): GO_JSON_OUT := emit_defaults=true
 $(COSI_GO_TMP): GO_JSON_OUT := $(GO_JSON_OUT):"$(HERE)/$(COSI_BUILD)"
 $(COSI_GO_TMP): GO_FAKE_OUT := emit_defaults
 $(COSI_GO_TMP): GO_FAKE_OUT := $(GO_FAKE_OUT),packagePath=sigs.k8s.io/container-object-storage-interface-spec
diff --git a/cosi.pb.go b/cosi.pb.go
index ec33085..d25d1b2 100644
--- a/cosi.pb.go
+++ b/cosi.pb.go
@@ -3,7 +3,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0
-// 	protoc        v3.9.1
+// 	protoc        v3.14.0
 // source: sigs.k8s.io/container-object-storage-interface-spec/cosi.proto
 
 package cosi
@@ -143,6 +143,57 @@ func (AnonymousBucketAccessMode) EnumDescriptor() ([]byte, []int) {
 	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{1}
 }
 
+type AuthenticationType int32
+
+const (
+	AuthenticationType_UnknownAuthenticationType AuthenticationType = 0
+	// Default, KEY based authentication.
+	AuthenticationType_Key AuthenticationType = 1
+	// Storageaccount based authentication.
+	AuthenticationType_IAM AuthenticationType = 2
+)
+
+// Enum value maps for AuthenticationType.
+var (
+	AuthenticationType_name = map[int32]string{
+		0: "UnknownAuthenticationType",
+		1: "Key",
+		2: "IAM",
+	}
+	AuthenticationType_value = map[string]int32{
+		"UnknownAuthenticationType": 0,
+		"Key":                       1,
+		"IAM":                       2,
+	}
+)
+
+func (x AuthenticationType) Enum() *AuthenticationType {
+	p := new(AuthenticationType)
+	*p = x
+	return p
+}
+
+func (x AuthenticationType) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (AuthenticationType) Descriptor() protoreflect.EnumDescriptor {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_enumTypes[2].Descriptor()
+}
+
+func (AuthenticationType) Type() protoreflect.EnumType {
+	return &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_enumTypes[2]
+}
+
+func (x AuthenticationType) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use AuthenticationType.Descriptor instead.
+func (AuthenticationType) EnumDescriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{2}
+}
+
 type S3 struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -408,14 +459,17 @@ func (*Protocol_AzureBlob) isProtocol_Type() {}
 
 func (*Protocol_Gcs) isProtocol_Type() {}
 
-type ProvisionerGetInfoRequest struct {
+type CredentialDetails struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
+
+	// map of the details in the secrets for the protocol string
+	Secrets map[string]string `protobuf:"bytes,1,rep,name=secrets,proto3" json:"secrets,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 }
 
-func (x *ProvisionerGetInfoRequest) Reset() {
-	*x = ProvisionerGetInfoRequest{}
+func (x *CredentialDetails) Reset() {
+	*x = CredentialDetails{}
 	if protoimpl.UnsafeEnabled {
 		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -423,13 +477,13 @@ func (x *ProvisionerGetInfoRequest) Reset() {
 	}
 }
 
-func (x *ProvisionerGetInfoRequest) String() string {
+func (x *CredentialDetails) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerGetInfoRequest) ProtoMessage() {}
+func (*CredentialDetails) ProtoMessage() {}
 
-func (x *ProvisionerGetInfoRequest) ProtoReflect() protoreflect.Message {
+func (x *CredentialDetails) ProtoReflect() protoreflect.Message {
 	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -441,12 +495,57 @@ func (x *ProvisionerGetInfoRequest) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerGetInfoRequest.ProtoReflect.Descriptor instead.
-func (*ProvisionerGetInfoRequest) Descriptor() ([]byte, []int) {
+// Deprecated: Use CredentialDetails.ProtoReflect.Descriptor instead.
+func (*CredentialDetails) Descriptor() ([]byte, []int) {
 	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{4}
 }
 
-type ProvisionerGetInfoResponse struct {
+func (x *CredentialDetails) GetSecrets() map[string]string {
+	if x != nil {
+		return x.Secrets
+	}
+	return nil
+}
+
+type DriverGetInfoRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *DriverGetInfoRequest) Reset() {
+	*x = DriverGetInfoRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DriverGetInfoRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DriverGetInfoRequest) ProtoMessage() {}
+
+func (x *DriverGetInfoRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DriverGetInfoRequest.ProtoReflect.Descriptor instead.
+func (*DriverGetInfoRequest) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{5}
+}
+
+type DriverGetInfoResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
@@ -462,23 +561,23 @@ type ProvisionerGetInfoResponse struct {
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 }
 
-func (x *ProvisionerGetInfoResponse) Reset() {
-	*x = ProvisionerGetInfoResponse{}
+func (x *DriverGetInfoResponse) Reset() {
+	*x = DriverGetInfoResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[5]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerGetInfoResponse) String() string {
+func (x *DriverGetInfoResponse) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerGetInfoResponse) ProtoMessage() {}
+func (*DriverGetInfoResponse) ProtoMessage() {}
 
-func (x *ProvisionerGetInfoResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[5]
+func (x *DriverGetInfoResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -489,19 +588,19 @@ func (x *ProvisionerGetInfoResponse) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerGetInfoResponse.ProtoReflect.Descriptor instead.
-func (*ProvisionerGetInfoResponse) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{5}
+// Deprecated: Use DriverGetInfoResponse.ProtoReflect.Descriptor instead.
+func (*DriverGetInfoResponse) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{6}
 }
 
-func (x *ProvisionerGetInfoResponse) GetName() string {
+func (x *DriverGetInfoResponse) GetName() string {
 	if x != nil {
 		return x.Name
 	}
 	return ""
 }
 
-type ProvisionerCreateBucketRequest struct {
+type DriverCreateBucketRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
@@ -509,32 +608,29 @@ type ProvisionerCreateBucketRequest struct {
 	// This field is REQUIRED
 	// name specifies the name of the bucket that should be created.
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
-	// This field is REQUIRED
-	// Protocol specific information required by the call is passed in as key,value pairs.
-	Protocol *Protocol `protobuf:"bytes,2,opt,name=protocol,proto3" json:"protocol,omitempty"`
 	// This field is OPTIONAL
 	// The caller should treat the values in parameters as opaque.
 	// The receiver is responsible for parsing and validating the values.
-	Parameters map[string]string `protobuf:"bytes,3,rep,name=parameters,proto3" json:"parameters,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	Parameters map[string]string `protobuf:"bytes,2,rep,name=parameters,proto3" json:"parameters,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 }
 
-func (x *ProvisionerCreateBucketRequest) Reset() {
-	*x = ProvisionerCreateBucketRequest{}
+func (x *DriverCreateBucketRequest) Reset() {
+	*x = DriverCreateBucketRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[6]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerCreateBucketRequest) String() string {
+func (x *DriverCreateBucketRequest) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerCreateBucketRequest) ProtoMessage() {}
+func (*DriverCreateBucketRequest) ProtoMessage() {}
 
-func (x *ProvisionerCreateBucketRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[6]
+func (x *DriverCreateBucketRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -545,59 +641,55 @@ func (x *ProvisionerCreateBucketRequest) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerCreateBucketRequest.ProtoReflect.Descriptor instead.
-func (*ProvisionerCreateBucketRequest) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{6}
+// Deprecated: Use DriverCreateBucketRequest.ProtoReflect.Descriptor instead.
+func (*DriverCreateBucketRequest) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{7}
 }
 
-func (x *ProvisionerCreateBucketRequest) GetName() string {
+func (x *DriverCreateBucketRequest) GetName() string {
 	if x != nil {
 		return x.Name
 	}
 	return ""
 }
 
-func (x *ProvisionerCreateBucketRequest) GetProtocol() *Protocol {
-	if x != nil {
-		return x.Protocol
-	}
-	return nil
-}
-
-func (x *ProvisionerCreateBucketRequest) GetParameters() map[string]string {
+func (x *DriverCreateBucketRequest) GetParameters() map[string]string {
 	if x != nil {
 		return x.Parameters
 	}
 	return nil
 }
 
-type ProvisionerCreateBucketResponse struct {
+type DriverCreateBucketResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
 	// bucket_id returned here is expected to be the globally unique
-	// identifier for the bucket in the object storage provider
+	// identifier for the bucket in the object storage provider.
 	BucketId string `protobuf:"bytes,1,opt,name=bucket_id,json=bucketId,proto3" json:"bucket_id,omitempty"`
+	// bucket_info returned here stores the data specific to the
+	// bucket required by the object storage provider to connect to the bucket.
+	BucketInfo *Protocol `protobuf:"bytes,2,opt,name=bucket_info,json=bucketInfo,proto3" json:"bucket_info,omitempty"`
 }
 
-func (x *ProvisionerCreateBucketResponse) Reset() {
-	*x = ProvisionerCreateBucketResponse{}
+func (x *DriverCreateBucketResponse) Reset() {
+	*x = DriverCreateBucketResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[7]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerCreateBucketResponse) String() string {
+func (x *DriverCreateBucketResponse) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerCreateBucketResponse) ProtoMessage() {}
+func (*DriverCreateBucketResponse) ProtoMessage() {}
 
-func (x *ProvisionerCreateBucketResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[7]
+func (x *DriverCreateBucketResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -608,19 +700,26 @@ func (x *ProvisionerCreateBucketResponse) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerCreateBucketResponse.ProtoReflect.Descriptor instead.
-func (*ProvisionerCreateBucketResponse) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{7}
+// Deprecated: Use DriverCreateBucketResponse.ProtoReflect.Descriptor instead.
+func (*DriverCreateBucketResponse) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{8}
 }
 
-func (x *ProvisionerCreateBucketResponse) GetBucketId() string {
+func (x *DriverCreateBucketResponse) GetBucketId() string {
 	if x != nil {
 		return x.BucketId
 	}
 	return ""
 }
 
-type ProvisionerDeleteBucketRequest struct {
+func (x *DriverCreateBucketResponse) GetBucketInfo() *Protocol {
+	if x != nil {
+		return x.BucketInfo
+	}
+	return nil
+}
+
+type DriverDeleteBucketRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
@@ -631,23 +730,23 @@ type ProvisionerDeleteBucketRequest struct {
 	BucketId string `protobuf:"bytes,1,opt,name=bucket_id,json=bucketId,proto3" json:"bucket_id,omitempty"`
 }
 
-func (x *ProvisionerDeleteBucketRequest) Reset() {
-	*x = ProvisionerDeleteBucketRequest{}
+func (x *DriverDeleteBucketRequest) Reset() {
+	*x = DriverDeleteBucketRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[8]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerDeleteBucketRequest) String() string {
+func (x *DriverDeleteBucketRequest) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerDeleteBucketRequest) ProtoMessage() {}
+func (*DriverDeleteBucketRequest) ProtoMessage() {}
 
-func (x *ProvisionerDeleteBucketRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[8]
+func (x *DriverDeleteBucketRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -658,41 +757,41 @@ func (x *ProvisionerDeleteBucketRequest) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerDeleteBucketRequest.ProtoReflect.Descriptor instead.
-func (*ProvisionerDeleteBucketRequest) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{8}
+// Deprecated: Use DriverDeleteBucketRequest.ProtoReflect.Descriptor instead.
+func (*DriverDeleteBucketRequest) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{9}
 }
 
-func (x *ProvisionerDeleteBucketRequest) GetBucketId() string {
+func (x *DriverDeleteBucketRequest) GetBucketId() string {
 	if x != nil {
 		return x.BucketId
 	}
 	return ""
 }
 
-type ProvisionerDeleteBucketResponse struct {
+type DriverDeleteBucketResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 }
 
-func (x *ProvisionerDeleteBucketResponse) Reset() {
-	*x = ProvisionerDeleteBucketResponse{}
+func (x *DriverDeleteBucketResponse) Reset() {
+	*x = DriverDeleteBucketResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[9]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerDeleteBucketResponse) String() string {
+func (x *DriverDeleteBucketResponse) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerDeleteBucketResponse) ProtoMessage() {}
+func (*DriverDeleteBucketResponse) ProtoMessage() {}
 
-func (x *ProvisionerDeleteBucketResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[9]
+func (x *DriverDeleteBucketResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -703,12 +802,12 @@ func (x *ProvisionerDeleteBucketResponse) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerDeleteBucketResponse.ProtoReflect.Descriptor instead.
-func (*ProvisionerDeleteBucketResponse) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{9}
+// Deprecated: Use DriverDeleteBucketResponse.ProtoReflect.Descriptor instead.
+func (*DriverDeleteBucketResponse) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{10}
 }
 
-type ProvisionerGrantBucketAccessRequest struct {
+type DriverGrantBucketAccessRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
@@ -718,36 +817,35 @@ type ProvisionerGrantBucketAccessRequest struct {
 	// in the object storage provider
 	BucketId string `protobuf:"bytes,1,opt,name=bucket_id,json=bucketId,proto3" json:"bucket_id,omitempty"`
 	// This field is REQUIRED
-	// account_name is a identifier for object storage provider
-	// to ensure that multiple requests for the same account
-	// result in only one access token being created
-	AccountName string `protobuf:"bytes,2,opt,name=account_name,json=accountName,proto3" json:"account_name,omitempty"`
+	// name field is used to define the name of the bucket access object.
+	Name string `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
 	// This field is REQUIRED
-	// Requested Access policy, ex: {"Effect":"Allow","Action":"s3:PutObject","Resource":"arn:aws:s3:::profilepics/*"}
-	AccessPolicy string `protobuf:"bytes,3,opt,name=access_policy,json=accessPolicy,proto3" json:"access_policy,omitempty"`
+	// Requested authentication type for the bucket access.
+	// Supported authentication types are KEY or IAM.
+	AuthenticationType AuthenticationType `protobuf:"varint,3,opt,name=authentication_type,json=authenticationType,proto3,enum=cosi.v1alpha1.AuthenticationType" json:"authentication_type,omitempty"`
 	// This field is OPTIONAL
 	// The caller should treat the values in parameters as opaque.
 	// The receiver is responsible for parsing and validating the values.
 	Parameters map[string]string `protobuf:"bytes,4,rep,name=parameters,proto3" json:"parameters,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 }
 
-func (x *ProvisionerGrantBucketAccessRequest) Reset() {
-	*x = ProvisionerGrantBucketAccessRequest{}
+func (x *DriverGrantBucketAccessRequest) Reset() {
+	*x = DriverGrantBucketAccessRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[10]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerGrantBucketAccessRequest) String() string {
+func (x *DriverGrantBucketAccessRequest) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerGrantBucketAccessRequest) ProtoMessage() {}
+func (*DriverGrantBucketAccessRequest) ProtoMessage() {}
 
-func (x *ProvisionerGrantBucketAccessRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[10]
+func (x *DriverGrantBucketAccessRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -758,70 +856,70 @@ func (x *ProvisionerGrantBucketAccessRequest) ProtoReflect() protoreflect.Messag
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerGrantBucketAccessRequest.ProtoReflect.Descriptor instead.
-func (*ProvisionerGrantBucketAccessRequest) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{10}
+// Deprecated: Use DriverGrantBucketAccessRequest.ProtoReflect.Descriptor instead.
+func (*DriverGrantBucketAccessRequest) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{11}
 }
 
-func (x *ProvisionerGrantBucketAccessRequest) GetBucketId() string {
+func (x *DriverGrantBucketAccessRequest) GetBucketId() string {
 	if x != nil {
 		return x.BucketId
 	}
 	return ""
 }
 
-func (x *ProvisionerGrantBucketAccessRequest) GetAccountName() string {
+func (x *DriverGrantBucketAccessRequest) GetName() string {
 	if x != nil {
-		return x.AccountName
+		return x.Name
 	}
 	return ""
 }
 
-func (x *ProvisionerGrantBucketAccessRequest) GetAccessPolicy() string {
+func (x *DriverGrantBucketAccessRequest) GetAuthenticationType() AuthenticationType {
 	if x != nil {
-		return x.AccessPolicy
+		return x.AuthenticationType
 	}
-	return ""
+	return AuthenticationType_UnknownAuthenticationType
 }
 
-func (x *ProvisionerGrantBucketAccessRequest) GetParameters() map[string]string {
+func (x *DriverGrantBucketAccessRequest) GetParameters() map[string]string {
 	if x != nil {
 		return x.Parameters
 	}
 	return nil
 }
 
-type ProvisionerGrantBucketAccessResponse struct {
+type DriverGrantBucketAccessResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// This field is OPTIONAL
+	// This field is REQUIRED
 	// This is the account_id that is being provided access. This will
 	// be required later to revoke access.
 	AccountId string `protobuf:"bytes,1,opt,name=account_id,json=accountId,proto3" json:"account_id,omitempty"`
-	// This field is OPTIONAL
+	// This field is REQUIRED
 	// Credentials supplied for accessing the bucket ex: aws access key id and secret, etc.
-	Credentials string `protobuf:"bytes,2,opt,name=credentials,proto3" json:"credentials,omitempty"`
+	Credentials map[string]*CredentialDetails `protobuf:"bytes,2,rep,name=credentials,proto3" json:"credentials,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 }
 
-func (x *ProvisionerGrantBucketAccessResponse) Reset() {
-	*x = ProvisionerGrantBucketAccessResponse{}
+func (x *DriverGrantBucketAccessResponse) Reset() {
+	*x = DriverGrantBucketAccessResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[11]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerGrantBucketAccessResponse) String() string {
+func (x *DriverGrantBucketAccessResponse) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerGrantBucketAccessResponse) ProtoMessage() {}
+func (*DriverGrantBucketAccessResponse) ProtoMessage() {}
 
-func (x *ProvisionerGrantBucketAccessResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[11]
+func (x *DriverGrantBucketAccessResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -832,26 +930,26 @@ func (x *ProvisionerGrantBucketAccessResponse) ProtoReflect() protoreflect.Messa
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerGrantBucketAccessResponse.ProtoReflect.Descriptor instead.
-func (*ProvisionerGrantBucketAccessResponse) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{11}
+// Deprecated: Use DriverGrantBucketAccessResponse.ProtoReflect.Descriptor instead.
+func (*DriverGrantBucketAccessResponse) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{12}
 }
 
-func (x *ProvisionerGrantBucketAccessResponse) GetAccountId() string {
+func (x *DriverGrantBucketAccessResponse) GetAccountId() string {
 	if x != nil {
 		return x.AccountId
 	}
 	return ""
 }
 
-func (x *ProvisionerGrantBucketAccessResponse) GetCredentials() string {
+func (x *DriverGrantBucketAccessResponse) GetCredentials() map[string]*CredentialDetails {
 	if x != nil {
 		return x.Credentials
 	}
-	return ""
+	return nil
 }
 
-type ProvisionerRevokeBucketAccessRequest struct {
+type DriverRevokeBucketAccessRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
@@ -865,23 +963,23 @@ type ProvisionerRevokeBucketAccessRequest struct {
 	AccountId string `protobuf:"bytes,2,opt,name=account_id,json=accountId,proto3" json:"account_id,omitempty"`
 }
 
-func (x *ProvisionerRevokeBucketAccessRequest) Reset() {
-	*x = ProvisionerRevokeBucketAccessRequest{}
+func (x *DriverRevokeBucketAccessRequest) Reset() {
+	*x = DriverRevokeBucketAccessRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[12]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerRevokeBucketAccessRequest) String() string {
+func (x *DriverRevokeBucketAccessRequest) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerRevokeBucketAccessRequest) ProtoMessage() {}
+func (*DriverRevokeBucketAccessRequest) ProtoMessage() {}
 
-func (x *ProvisionerRevokeBucketAccessRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[12]
+func (x *DriverRevokeBucketAccessRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -892,48 +990,48 @@ func (x *ProvisionerRevokeBucketAccessRequest) ProtoReflect() protoreflect.Messa
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerRevokeBucketAccessRequest.ProtoReflect.Descriptor instead.
-func (*ProvisionerRevokeBucketAccessRequest) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{12}
+// Deprecated: Use DriverRevokeBucketAccessRequest.ProtoReflect.Descriptor instead.
+func (*DriverRevokeBucketAccessRequest) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{13}
 }
 
-func (x *ProvisionerRevokeBucketAccessRequest) GetBucketId() string {
+func (x *DriverRevokeBucketAccessRequest) GetBucketId() string {
 	if x != nil {
 		return x.BucketId
 	}
 	return ""
 }
 
-func (x *ProvisionerRevokeBucketAccessRequest) GetAccountId() string {
+func (x *DriverRevokeBucketAccessRequest) GetAccountId() string {
 	if x != nil {
 		return x.AccountId
 	}
 	return ""
 }
 
-type ProvisionerRevokeBucketAccessResponse struct {
+type DriverRevokeBucketAccessResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 }
 
-func (x *ProvisionerRevokeBucketAccessResponse) Reset() {
-	*x = ProvisionerRevokeBucketAccessResponse{}
+func (x *DriverRevokeBucketAccessResponse) Reset() {
+	*x = DriverRevokeBucketAccessResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[13]
+		mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
 }
 
-func (x *ProvisionerRevokeBucketAccessResponse) String() string {
+func (x *DriverRevokeBucketAccessResponse) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ProvisionerRevokeBucketAccessResponse) ProtoMessage() {}
+func (*DriverRevokeBucketAccessResponse) ProtoMessage() {}
 
-func (x *ProvisionerRevokeBucketAccessResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[13]
+func (x *DriverRevokeBucketAccessResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -944,9 +1042,9 @@ func (x *ProvisionerRevokeBucketAccessResponse) ProtoReflect() protoreflect.Mess
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ProvisionerRevokeBucketAccessResponse.ProtoReflect.Descriptor instead.
-func (*ProvisionerRevokeBucketAccessResponse) Descriptor() ([]byte, []int) {
-	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{13}
+// Deprecated: Use DriverRevokeBucketAccessResponse.ProtoReflect.Descriptor instead.
+func (*DriverRevokeBucketAccessResponse) Descriptor() ([]byte, []int) {
+	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescGZIP(), []int{14}
 }
 
 var file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_extTypes = []protoimpl.ExtensionInfo{
@@ -1110,160 +1208,178 @@ var file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDesc
 	0x09, 0x61, 0x7a, 0x75, 0x72, 0x65, 0x42, 0x6c, 0x6f, 0x62, 0x12, 0x26, 0x0a, 0x03, 0x67, 0x63,
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 }
 
 var (
@@ -1278,64 +1394,72 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDesc
 	return file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDescData
 }
 
-var file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes = make([]protoimpl.MessageInfo, 16)
+var file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
+var file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes = make([]protoimpl.MessageInfo, 19)
 var file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_goTypes = []interface{}{
-	(S3SignatureVersion)(0),                       // 0: cosi.v1alpha1.S3SignatureVersion
-	(AnonymousBucketAccessMode)(0),                // 1: cosi.v1alpha1.AnonymousBucketAccessMode
-	(*S3)(nil),                                    // 2: cosi.v1alpha1.S3
-	(*AzureBlob)(nil),                             // 3: cosi.v1alpha1.AzureBlob
-	(*GCS)(nil),                                   // 4: cosi.v1alpha1.GCS
-	(*Protocol)(nil),                              // 5: cosi.v1alpha1.Protocol
-	(*ProvisionerGetInfoRequest)(nil),             // 6: cosi.v1alpha1.ProvisionerGetInfoRequest
-	(*ProvisionerGetInfoResponse)(nil),            // 7: cosi.v1alpha1.ProvisionerGetInfoResponse
-	(*ProvisionerCreateBucketRequest)(nil),        // 8: cosi.v1alpha1.ProvisionerCreateBucketRequest
-	(*ProvisionerCreateBucketResponse)(nil),       // 9: cosi.v1alpha1.ProvisionerCreateBucketResponse
-	(*ProvisionerDeleteBucketRequest)(nil),        // 10: cosi.v1alpha1.ProvisionerDeleteBucketRequest
-	(*ProvisionerDeleteBucketResponse)(nil),       // 11: cosi.v1alpha1.ProvisionerDeleteBucketResponse
-	(*ProvisionerGrantBucketAccessRequest)(nil),   // 12: cosi.v1alpha1.ProvisionerGrantBucketAccessRequest
-	(*ProvisionerGrantBucketAccessResponse)(nil),  // 13: cosi.v1alpha1.ProvisionerGrantBucketAccessResponse
-	(*ProvisionerRevokeBucketAccessRequest)(nil),  // 14: cosi.v1alpha1.ProvisionerRevokeBucketAccessRequest
-	(*ProvisionerRevokeBucketAccessResponse)(nil), // 15: cosi.v1alpha1.ProvisionerRevokeBucketAccessResponse
-	nil,                                 // 16: cosi.v1alpha1.ProvisionerCreateBucketRequest.ParametersEntry
-	nil,                                 // 17: cosi.v1alpha1.ProvisionerGrantBucketAccessRequest.ParametersEntry
-	(*descriptor.EnumOptions)(nil),      // 18: google.protobuf.EnumOptions
-	(*descriptor.EnumValueOptions)(nil), // 19: google.protobuf.EnumValueOptions
-	(*descriptor.FieldOptions)(nil),     // 20: google.protobuf.FieldOptions
-	(*descriptor.MessageOptions)(nil),   // 21: google.protobuf.MessageOptions
-	(*descriptor.MethodOptions)(nil),    // 22: google.protobuf.MethodOptions
-	(*descriptor.ServiceOptions)(nil),   // 23: google.protobuf.ServiceOptions
+	(S3SignatureVersion)(0),                  // 0: cosi.v1alpha1.S3SignatureVersion
+	(AnonymousBucketAccessMode)(0),           // 1: cosi.v1alpha1.AnonymousBucketAccessMode
+	(AuthenticationType)(0),                  // 2: cosi.v1alpha1.AuthenticationType
+	(*S3)(nil),                               // 3: cosi.v1alpha1.S3
+	(*AzureBlob)(nil),                        // 4: cosi.v1alpha1.AzureBlob
+	(*GCS)(nil),                              // 5: cosi.v1alpha1.GCS
+	(*Protocol)(nil),                         // 6: cosi.v1alpha1.Protocol
+	(*CredentialDetails)(nil),                // 7: cosi.v1alpha1.CredentialDetails
+	(*DriverGetInfoRequest)(nil),             // 8: cosi.v1alpha1.DriverGetInfoRequest
+	(*DriverGetInfoResponse)(nil),            // 9: cosi.v1alpha1.DriverGetInfoResponse
+	(*DriverCreateBucketRequest)(nil),        // 10: cosi.v1alpha1.DriverCreateBucketRequest
+	(*DriverCreateBucketResponse)(nil),       // 11: cosi.v1alpha1.DriverCreateBucketResponse
+	(*DriverDeleteBucketRequest)(nil),        // 12: cosi.v1alpha1.DriverDeleteBucketRequest
+	(*DriverDeleteBucketResponse)(nil),       // 13: cosi.v1alpha1.DriverDeleteBucketResponse
+	(*DriverGrantBucketAccessRequest)(nil),   // 14: cosi.v1alpha1.DriverGrantBucketAccessRequest
+	(*DriverGrantBucketAccessResponse)(nil),  // 15: cosi.v1alpha1.DriverGrantBucketAccessResponse
+	(*DriverRevokeBucketAccessRequest)(nil),  // 16: cosi.v1alpha1.DriverRevokeBucketAccessRequest
+	(*DriverRevokeBucketAccessResponse)(nil), // 17: cosi.v1alpha1.DriverRevokeBucketAccessResponse
+	nil,                                      // 18: cosi.v1alpha1.CredentialDetails.SecretsEntry
+	nil,                                      // 19: cosi.v1alpha1.DriverCreateBucketRequest.ParametersEntry
+	nil,                                      // 20: cosi.v1alpha1.DriverGrantBucketAccessRequest.ParametersEntry
+	nil,                                      // 21: cosi.v1alpha1.DriverGrantBucketAccessResponse.CredentialsEntry
+	(*descriptor.EnumOptions)(nil),           // 22: google.protobuf.EnumOptions
+	(*descriptor.EnumValueOptions)(nil),      // 23: google.protobuf.EnumValueOptions
+	(*descriptor.FieldOptions)(nil),          // 24: google.protobuf.FieldOptions
+	(*descriptor.MessageOptions)(nil),        // 25: google.protobuf.MessageOptions
+	(*descriptor.MethodOptions)(nil),         // 26: google.protobuf.MethodOptions
+	(*descriptor.ServiceOptions)(nil),        // 27: google.protobuf.ServiceOptions
 }
 var file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_depIdxs = []int32{
 	0,  // 0: cosi.v1alpha1.S3.signature_version:type_name -> cosi.v1alpha1.S3SignatureVersion
-	2,  // 1: cosi.v1alpha1.Protocol.s3:type_name -> cosi.v1alpha1.S3
-	3,  // 2: cosi.v1alpha1.Protocol.azureBlob:type_name -> cosi.v1alpha1.AzureBlob
-	4,  // 3: cosi.v1alpha1.Protocol.gcs:type_name -> cosi.v1alpha1.GCS
-	5,  // 4: cosi.v1alpha1.ProvisionerCreateBucketRequest.protocol:type_name -> cosi.v1alpha1.Protocol
-	16, // 5: cosi.v1alpha1.ProvisionerCreateBucketRequest.parameters:type_name -> cosi.v1alpha1.ProvisionerCreateBucketRequest.ParametersEntry
-	17, // 6: cosi.v1alpha1.ProvisionerGrantBucketAccessRequest.parameters:type_name -> cosi.v1alpha1.ProvisionerGrantBucketAccessRequest.ParametersEntry
-	18, // 7: cosi.v1alpha1.alpha_enum:extendee -> google.protobuf.EnumOptions
-	19, // 8: cosi.v1alpha1.alpha_enum_value:extendee -> google.protobuf.EnumValueOptions
-	20, // 9: cosi.v1alpha1.cosi_secret:extendee -> google.protobuf.FieldOptions
-	20, // 10: cosi.v1alpha1.alpha_field:extendee -> google.protobuf.FieldOptions
-	21, // 11: cosi.v1alpha1.alpha_message:extendee -> google.protobuf.MessageOptions
-	22, // 12: cosi.v1alpha1.alpha_method:extendee -> google.protobuf.MethodOptions
-	23, // 13: cosi.v1alpha1.alpha_service:extendee -> google.protobuf.ServiceOptions
-	6,  // 14: cosi.v1alpha1.Identity.ProvisionerGetInfo:input_type -> cosi.v1alpha1.ProvisionerGetInfoRequest
-	8,  // 15: cosi.v1alpha1.Provisioner.ProvisionerCreateBucket:input_type -> cosi.v1alpha1.ProvisionerCreateBucketRequest
-	10, // 16: cosi.v1alpha1.Provisioner.ProvisionerDeleteBucket:input_type -> cosi.v1alpha1.ProvisionerDeleteBucketRequest
-	12, // 17: cosi.v1alpha1.Provisioner.ProvisionerGrantBucketAccess:input_type -> cosi.v1alpha1.ProvisionerGrantBucketAccessRequest
-	14, // 18: cosi.v1alpha1.Provisioner.ProvisionerRevokeBucketAccess:input_type -> cosi.v1alpha1.ProvisionerRevokeBucketAccessRequest
-	7,  // 19: cosi.v1alpha1.Identity.ProvisionerGetInfo:output_type -> cosi.v1alpha1.ProvisionerGetInfoResponse
-	9,  // 20: cosi.v1alpha1.Provisioner.ProvisionerCreateBucket:output_type -> cosi.v1alpha1.ProvisionerCreateBucketResponse
-	11, // 21: cosi.v1alpha1.Provisioner.ProvisionerDeleteBucket:output_type -> cosi.v1alpha1.ProvisionerDeleteBucketResponse
-	13, // 22: cosi.v1alpha1.Provisioner.ProvisionerGrantBucketAccess:output_type -> cosi.v1alpha1.ProvisionerGrantBucketAccessResponse
-	15, // 23: cosi.v1alpha1.Provisioner.ProvisionerRevokeBucketAccess:output_type -> cosi.v1alpha1.ProvisionerRevokeBucketAccessResponse
-	19, // [19:24] is the sub-list for method output_type
-	14, // [14:19] is the sub-list for method input_type
-	14, // [14:14] is the sub-list for extension type_name
-	7,  // [7:14] is the sub-list for extension extendee
-	0,  // [0:7] is the sub-list for field type_name
+	3,  // 1: cosi.v1alpha1.Protocol.s3:type_name -> cosi.v1alpha1.S3
+	4,  // 2: cosi.v1alpha1.Protocol.azureBlob:type_name -> cosi.v1alpha1.AzureBlob
+	5,  // 3: cosi.v1alpha1.Protocol.gcs:type_name -> cosi.v1alpha1.GCS
+	18, // 4: cosi.v1alpha1.CredentialDetails.secrets:type_name -> cosi.v1alpha1.CredentialDetails.SecretsEntry
+	19, // 5: cosi.v1alpha1.DriverCreateBucketRequest.parameters:type_name -> cosi.v1alpha1.DriverCreateBucketRequest.ParametersEntry
+	6,  // 6: cosi.v1alpha1.DriverCreateBucketResponse.bucket_info:type_name -> cosi.v1alpha1.Protocol
+	2,  // 7: cosi.v1alpha1.DriverGrantBucketAccessRequest.authentication_type:type_name -> cosi.v1alpha1.AuthenticationType
+	20, // 8: cosi.v1alpha1.DriverGrantBucketAccessRequest.parameters:type_name -> cosi.v1alpha1.DriverGrantBucketAccessRequest.ParametersEntry
+	21, // 9: cosi.v1alpha1.DriverGrantBucketAccessResponse.credentials:type_name -> cosi.v1alpha1.DriverGrantBucketAccessResponse.CredentialsEntry
+	7,  // 10: cosi.v1alpha1.DriverGrantBucketAccessResponse.CredentialsEntry.value:type_name -> cosi.v1alpha1.CredentialDetails
+	22, // 11: cosi.v1alpha1.alpha_enum:extendee -> google.protobuf.EnumOptions
+	23, // 12: cosi.v1alpha1.alpha_enum_value:extendee -> google.protobuf.EnumValueOptions
+	24, // 13: cosi.v1alpha1.cosi_secret:extendee -> google.protobuf.FieldOptions
+	24, // 14: cosi.v1alpha1.alpha_field:extendee -> google.protobuf.FieldOptions
+	25, // 15: cosi.v1alpha1.alpha_message:extendee -> google.protobuf.MessageOptions
+	26, // 16: cosi.v1alpha1.alpha_method:extendee -> google.protobuf.MethodOptions
+	27, // 17: cosi.v1alpha1.alpha_service:extendee -> google.protobuf.ServiceOptions
+	8,  // 18: cosi.v1alpha1.Identity.DriverGetInfo:input_type -> cosi.v1alpha1.DriverGetInfoRequest
+	10, // 19: cosi.v1alpha1.Provisioner.DriverCreateBucket:input_type -> cosi.v1alpha1.DriverCreateBucketRequest
+	12, // 20: cosi.v1alpha1.Provisioner.DriverDeleteBucket:input_type -> cosi.v1alpha1.DriverDeleteBucketRequest
+	14, // 21: cosi.v1alpha1.Provisioner.DriverGrantBucketAccess:input_type -> cosi.v1alpha1.DriverGrantBucketAccessRequest
+	16, // 22: cosi.v1alpha1.Provisioner.DriverRevokeBucketAccess:input_type -> cosi.v1alpha1.DriverRevokeBucketAccessRequest
+	9,  // 23: cosi.v1alpha1.Identity.DriverGetInfo:output_type -> cosi.v1alpha1.DriverGetInfoResponse
+	11, // 24: cosi.v1alpha1.Provisioner.DriverCreateBucket:output_type -> cosi.v1alpha1.DriverCreateBucketResponse
+	13, // 25: cosi.v1alpha1.Provisioner.DriverDeleteBucket:output_type -> cosi.v1alpha1.DriverDeleteBucketResponse
+	15, // 26: cosi.v1alpha1.Provisioner.DriverGrantBucketAccess:output_type -> cosi.v1alpha1.DriverGrantBucketAccessResponse
+	17, // 27: cosi.v1alpha1.Provisioner.DriverRevokeBucketAccess:output_type -> cosi.v1alpha1.DriverRevokeBucketAccessResponse
+	23, // [23:28] is the sub-list for method output_type
+	18, // [18:23] is the sub-list for method input_type
+	18, // [18:18] is the sub-list for extension type_name
+	11, // [11:18] is the sub-list for extension extendee
+	0,  // [0:11] is the sub-list for field type_name
 }
 
 func init() { file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init() }
@@ -1393,7 +1517,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerGetInfoRequest); i {
+			switch v := v.(*CredentialDetails); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1405,7 +1529,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerGetInfoResponse); i {
+			switch v := v.(*DriverGetInfoRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1417,7 +1541,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerCreateBucketRequest); i {
+			switch v := v.(*DriverGetInfoResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1429,7 +1553,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerCreateBucketResponse); i {
+			switch v := v.(*DriverCreateBucketRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1441,7 +1565,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerDeleteBucketRequest); i {
+			switch v := v.(*DriverCreateBucketResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1453,7 +1577,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerDeleteBucketResponse); i {
+			switch v := v.(*DriverDeleteBucketRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1465,7 +1589,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerGrantBucketAccessRequest); i {
+			switch v := v.(*DriverDeleteBucketResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1477,7 +1601,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerGrantBucketAccessResponse); i {
+			switch v := v.(*DriverGrantBucketAccessRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1489,7 +1613,7 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerRevokeBucketAccessRequest); i {
+			switch v := v.(*DriverGrantBucketAccessResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1501,7 +1625,19 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 			}
 		}
 		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProvisionerRevokeBucketAccessResponse); i {
+			switch v := v.(*DriverRevokeBucketAccessRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DriverRevokeBucketAccessResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1523,8 +1659,8 @@ func file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_init()
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_sigs_k8s_io_container_object_storage_interface_spec_cosi_proto_rawDesc,
-			NumEnums:      2,
-			NumMessages:   16,
+			NumEnums:      3,
+			NumMessages:   19,
 			NumExtensions: 7,
 			NumServices:   2,
 		},
@@ -1553,8 +1689,8 @@ const _ = grpc.SupportPackageIsVersion6
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
 type IdentityClient interface {
 	// This call is meant to retrieve the unique provisioner Identity.
-	// This identity will have to be set in BucketRequest.Provisioner field in order to invoke this specific provisioner.
-	ProvisionerGetInfo(ctx context.Context, in *ProvisionerGetInfoRequest, opts ...grpc.CallOption) (*ProvisionerGetInfoResponse, error)
+	// This identity will have to be set in BucketClaim.DriverName field in order to invoke this specific provisioner.
+	DriverGetInfo(ctx context.Context, in *DriverGetInfoRequest, opts ...grpc.CallOption) (*DriverGetInfoResponse, error)
 }
 
 type identityClient struct {
@@ -1565,9 +1701,9 @@ func NewIdentityClient(cc grpc.ClientConnInterface) IdentityClient {
 	return &identityClient{cc}
 }
 
-func (c *identityClient) ProvisionerGetInfo(ctx context.Context, in *ProvisionerGetInfoRequest, opts ...grpc.CallOption) (*ProvisionerGetInfoResponse, error) {
-	out := new(ProvisionerGetInfoResponse)
-	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Identity/ProvisionerGetInfo", in, out, opts...)
+func (c *identityClient) DriverGetInfo(ctx context.Context, in *DriverGetInfoRequest, opts ...grpc.CallOption) (*DriverGetInfoResponse, error) {
+	out := new(DriverGetInfoResponse)
+	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Identity/DriverGetInfo", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -1577,36 +1713,36 @@ func (c *identityClient) ProvisionerGetInfo(ctx context.Context, in *Provisioner
 // IdentityServer is the server API for Identity service.
 type IdentityServer interface {
 	// This call is meant to retrieve the unique provisioner Identity.
-	// This identity will have to be set in BucketRequest.Provisioner field in order to invoke this specific provisioner.
-	ProvisionerGetInfo(context.Context, *ProvisionerGetInfoRequest) (*ProvisionerGetInfoResponse, error)
+	// This identity will have to be set in BucketClaim.DriverName field in order to invoke this specific provisioner.
+	DriverGetInfo(context.Context, *DriverGetInfoRequest) (*DriverGetInfoResponse, error)
 }
 
 // UnimplementedIdentityServer can be embedded to have forward compatible implementations.
 type UnimplementedIdentityServer struct {
 }
 
-func (*UnimplementedIdentityServer) ProvisionerGetInfo(context.Context, *ProvisionerGetInfoRequest) (*ProvisionerGetInfoResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ProvisionerGetInfo not implemented")
+func (*UnimplementedIdentityServer) DriverGetInfo(context.Context, *DriverGetInfoRequest) (*DriverGetInfoResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DriverGetInfo not implemented")
 }
 
 func RegisterIdentityServer(s *grpc.Server, srv IdentityServer) {
 	s.RegisterService(&_Identity_serviceDesc, srv)
 }
 
-func _Identity_ProvisionerGetInfo_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ProvisionerGetInfoRequest)
+func _Identity_DriverGetInfo_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DriverGetInfoRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(IdentityServer).ProvisionerGetInfo(ctx, in)
+		return srv.(IdentityServer).DriverGetInfo(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/cosi.v1alpha1.Identity/ProvisionerGetInfo",
+		FullMethod: "/cosi.v1alpha1.Identity/DriverGetInfo",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(IdentityServer).ProvisionerGetInfo(ctx, req.(*ProvisionerGetInfoRequest))
+		return srv.(IdentityServer).DriverGetInfo(ctx, req.(*DriverGetInfoRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
@@ -1616,8 +1752,8 @@ var _Identity_serviceDesc = grpc.ServiceDesc{
 	HandlerType: (*IdentityServer)(nil),
 	Methods: []grpc.MethodDesc{
 		{
-			MethodName: "ProvisionerGetInfo",
-			Handler:    _Identity_ProvisionerGetInfo_Handler,
+			MethodName: "DriverGetInfo",
+			Handler:    _Identity_DriverGetInfo_Handler,
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
@@ -1632,15 +1768,15 @@ type ProvisionerClient interface {
 	// This call is idempotent
 	//    1. If a bucket that matches both name and parameters already exists, then OK (success) must be returned.
 	//    2. If a bucket by same name, but different parameters is provided, then the appropriate error code ALREADY_EXISTS must be returned.
-	ProvisionerCreateBucket(ctx context.Context, in *ProvisionerCreateBucketRequest, opts ...grpc.CallOption) (*ProvisionerCreateBucketResponse, error)
+	DriverCreateBucket(ctx context.Context, in *DriverCreateBucketRequest, opts ...grpc.CallOption) (*DriverCreateBucketResponse, error)
 	// This call is made to delete the bucket in the backend.
 	// If the bucket has already been deleted, then no error should be returned.
-	ProvisionerDeleteBucket(ctx context.Context, in *ProvisionerDeleteBucketRequest, opts ...grpc.CallOption) (*ProvisionerDeleteBucketResponse, error)
+	DriverDeleteBucket(ctx context.Context, in *DriverDeleteBucketRequest, opts ...grpc.CallOption) (*DriverDeleteBucketResponse, error)
 	// This call grants access to an account. The account_name in the request shall be used as a unique identifier to create credentials.
-	// The account_id returned in the response will be used as the unique identifier for deleting this access when calling ProvisionerRevokeBucketAccess.
-	ProvisionerGrantBucketAccess(ctx context.Context, in *ProvisionerGrantBucketAccessRequest, opts ...grpc.CallOption) (*ProvisionerGrantBucketAccessResponse, error)
+	// The account_id returned in the response will be used as the unique identifier for deleting this access when calling DriverRevokeBucketAccess.
+	DriverGrantBucketAccess(ctx context.Context, in *DriverGrantBucketAccessRequest, opts ...grpc.CallOption) (*DriverGrantBucketAccessResponse, error)
 	// This call revokes all access to a particular bucket from a principal.
-	ProvisionerRevokeBucketAccess(ctx context.Context, in *ProvisionerRevokeBucketAccessRequest, opts ...grpc.CallOption) (*ProvisionerRevokeBucketAccessResponse, error)
+	DriverRevokeBucketAccess(ctx context.Context, in *DriverRevokeBucketAccessRequest, opts ...grpc.CallOption) (*DriverRevokeBucketAccessResponse, error)
 }
 
 type provisionerClient struct {
@@ -1651,36 +1787,36 @@ func NewProvisionerClient(cc grpc.ClientConnInterface) ProvisionerClient {
 	return &provisionerClient{cc}
 }
 
-func (c *provisionerClient) ProvisionerCreateBucket(ctx context.Context, in *ProvisionerCreateBucketRequest, opts ...grpc.CallOption) (*ProvisionerCreateBucketResponse, error) {
-	out := new(ProvisionerCreateBucketResponse)
-	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Provisioner/ProvisionerCreateBucket", in, out, opts...)
+func (c *provisionerClient) DriverCreateBucket(ctx context.Context, in *DriverCreateBucketRequest, opts ...grpc.CallOption) (*DriverCreateBucketResponse, error) {
+	out := new(DriverCreateBucketResponse)
+	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Provisioner/DriverCreateBucket", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return out, nil
 }
 
-func (c *provisionerClient) ProvisionerDeleteBucket(ctx context.Context, in *ProvisionerDeleteBucketRequest, opts ...grpc.CallOption) (*ProvisionerDeleteBucketResponse, error) {
-	out := new(ProvisionerDeleteBucketResponse)
-	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Provisioner/ProvisionerDeleteBucket", in, out, opts...)
+func (c *provisionerClient) DriverDeleteBucket(ctx context.Context, in *DriverDeleteBucketRequest, opts ...grpc.CallOption) (*DriverDeleteBucketResponse, error) {
+	out := new(DriverDeleteBucketResponse)
+	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Provisioner/DriverDeleteBucket", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return out, nil
 }
 
-func (c *provisionerClient) ProvisionerGrantBucketAccess(ctx context.Context, in *ProvisionerGrantBucketAccessRequest, opts ...grpc.CallOption) (*ProvisionerGrantBucketAccessResponse, error) {
-	out := new(ProvisionerGrantBucketAccessResponse)
-	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Provisioner/ProvisionerGrantBucketAccess", in, out, opts...)
+func (c *provisionerClient) DriverGrantBucketAccess(ctx context.Context, in *DriverGrantBucketAccessRequest, opts ...grpc.CallOption) (*DriverGrantBucketAccessResponse, error) {
+	out := new(DriverGrantBucketAccessResponse)
+	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Provisioner/DriverGrantBucketAccess", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
 	return out, nil
 }
 
-func (c *provisionerClient) ProvisionerRevokeBucketAccess(ctx context.Context, in *ProvisionerRevokeBucketAccessRequest, opts ...grpc.CallOption) (*ProvisionerRevokeBucketAccessResponse, error) {
-	out := new(ProvisionerRevokeBucketAccessResponse)
-	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Provisioner/ProvisionerRevokeBucketAccess", in, out, opts...)
+func (c *provisionerClient) DriverRevokeBucketAccess(ctx context.Context, in *DriverRevokeBucketAccessRequest, opts ...grpc.CallOption) (*DriverRevokeBucketAccessResponse, error) {
+	out := new(DriverRevokeBucketAccessResponse)
+	err := c.cc.Invoke(ctx, "/cosi.v1alpha1.Provisioner/DriverRevokeBucketAccess", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -1693,106 +1829,106 @@ type ProvisionerServer interface {
 	// This call is idempotent
 	//    1. If a bucket that matches both name and parameters already exists, then OK (success) must be returned.
 	//    2. If a bucket by same name, but different parameters is provided, then the appropriate error code ALREADY_EXISTS must be returned.
-	ProvisionerCreateBucket(context.Context, *ProvisionerCreateBucketRequest) (*ProvisionerCreateBucketResponse, error)
+	DriverCreateBucket(context.Context, *DriverCreateBucketRequest) (*DriverCreateBucketResponse, error)
 	// This call is made to delete the bucket in the backend.
 	// If the bucket has already been deleted, then no error should be returned.
-	ProvisionerDeleteBucket(context.Context, *ProvisionerDeleteBucketRequest) (*ProvisionerDeleteBucketResponse, error)
+	DriverDeleteBucket(context.Context, *DriverDeleteBucketRequest) (*DriverDeleteBucketResponse, error)
 	// This call grants access to an account. The account_name in the request shall be used as a unique identifier to create credentials.
-	// The account_id returned in the response will be used as the unique identifier for deleting this access when calling ProvisionerRevokeBucketAccess.
-	ProvisionerGrantBucketAccess(context.Context, *ProvisionerGrantBucketAccessRequest) (*ProvisionerGrantBucketAccessResponse, error)
+	// The account_id returned in the response will be used as the unique identifier for deleting this access when calling DriverRevokeBucketAccess.
+	DriverGrantBucketAccess(context.Context, *DriverGrantBucketAccessRequest) (*DriverGrantBucketAccessResponse, error)
 	// This call revokes all access to a particular bucket from a principal.
-	ProvisionerRevokeBucketAccess(context.Context, *ProvisionerRevokeBucketAccessRequest) (*ProvisionerRevokeBucketAccessResponse, error)
+	DriverRevokeBucketAccess(context.Context, *DriverRevokeBucketAccessRequest) (*DriverRevokeBucketAccessResponse, error)
 }
 
 // UnimplementedProvisionerServer can be embedded to have forward compatible implementations.
 type UnimplementedProvisionerServer struct {
 }
 
-func (*UnimplementedProvisionerServer) ProvisionerCreateBucket(context.Context, *ProvisionerCreateBucketRequest) (*ProvisionerCreateBucketResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ProvisionerCreateBucket not implemented")
+func (*UnimplementedProvisionerServer) DriverCreateBucket(context.Context, *DriverCreateBucketRequest) (*DriverCreateBucketResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DriverCreateBucket not implemented")
 }
-func (*UnimplementedProvisionerServer) ProvisionerDeleteBucket(context.Context, *ProvisionerDeleteBucketRequest) (*ProvisionerDeleteBucketResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ProvisionerDeleteBucket not implemented")
+func (*UnimplementedProvisionerServer) DriverDeleteBucket(context.Context, *DriverDeleteBucketRequest) (*DriverDeleteBucketResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DriverDeleteBucket not implemented")
 }
-func (*UnimplementedProvisionerServer) ProvisionerGrantBucketAccess(context.Context, *ProvisionerGrantBucketAccessRequest) (*ProvisionerGrantBucketAccessResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ProvisionerGrantBucketAccess not implemented")
+func (*UnimplementedProvisionerServer) DriverGrantBucketAccess(context.Context, *DriverGrantBucketAccessRequest) (*DriverGrantBucketAccessResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DriverGrantBucketAccess not implemented")
 }
-func (*UnimplementedProvisionerServer) ProvisionerRevokeBucketAccess(context.Context, *ProvisionerRevokeBucketAccessRequest) (*ProvisionerRevokeBucketAccessResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ProvisionerRevokeBucketAccess not implemented")
+func (*UnimplementedProvisionerServer) DriverRevokeBucketAccess(context.Context, *DriverRevokeBucketAccessRequest) (*DriverRevokeBucketAccessResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DriverRevokeBucketAccess not implemented")
 }
 
 func RegisterProvisionerServer(s *grpc.Server, srv ProvisionerServer) {
 	s.RegisterService(&_Provisioner_serviceDesc, srv)
 }
 
-func _Provisioner_ProvisionerCreateBucket_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ProvisionerCreateBucketRequest)
+func _Provisioner_DriverCreateBucket_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DriverCreateBucketRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(ProvisionerServer).ProvisionerCreateBucket(ctx, in)
+		return srv.(ProvisionerServer).DriverCreateBucket(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/cosi.v1alpha1.Provisioner/ProvisionerCreateBucket",
+		FullMethod: "/cosi.v1alpha1.Provisioner/DriverCreateBucket",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ProvisionerServer).ProvisionerCreateBucket(ctx, req.(*ProvisionerCreateBucketRequest))
+		return srv.(ProvisionerServer).DriverCreateBucket(ctx, req.(*DriverCreateBucketRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-func _Provisioner_ProvisionerDeleteBucket_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ProvisionerDeleteBucketRequest)
+func _Provisioner_DriverDeleteBucket_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DriverDeleteBucketRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(ProvisionerServer).ProvisionerDeleteBucket(ctx, in)
+		return srv.(ProvisionerServer).DriverDeleteBucket(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/cosi.v1alpha1.Provisioner/ProvisionerDeleteBucket",
+		FullMethod: "/cosi.v1alpha1.Provisioner/DriverDeleteBucket",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ProvisionerServer).ProvisionerDeleteBucket(ctx, req.(*ProvisionerDeleteBucketRequest))
+		return srv.(ProvisionerServer).DriverDeleteBucket(ctx, req.(*DriverDeleteBucketRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-func _Provisioner_ProvisionerGrantBucketAccess_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ProvisionerGrantBucketAccessRequest)
+func _Provisioner_DriverGrantBucketAccess_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DriverGrantBucketAccessRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(ProvisionerServer).ProvisionerGrantBucketAccess(ctx, in)
+		return srv.(ProvisionerServer).DriverGrantBucketAccess(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/cosi.v1alpha1.Provisioner/ProvisionerGrantBucketAccess",
+		FullMethod: "/cosi.v1alpha1.Provisioner/DriverGrantBucketAccess",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ProvisionerServer).ProvisionerGrantBucketAccess(ctx, req.(*ProvisionerGrantBucketAccessRequest))
+		return srv.(ProvisionerServer).DriverGrantBucketAccess(ctx, req.(*DriverGrantBucketAccessRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
 
-func _Provisioner_ProvisionerRevokeBucketAccess_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ProvisionerRevokeBucketAccessRequest)
+func _Provisioner_DriverRevokeBucketAccess_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DriverRevokeBucketAccessRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(ProvisionerServer).ProvisionerRevokeBucketAccess(ctx, in)
+		return srv.(ProvisionerServer).DriverRevokeBucketAccess(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/cosi.v1alpha1.Provisioner/ProvisionerRevokeBucketAccess",
+		FullMethod: "/cosi.v1alpha1.Provisioner/DriverRevokeBucketAccess",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ProvisionerServer).ProvisionerRevokeBucketAccess(ctx, req.(*ProvisionerRevokeBucketAccessRequest))
+		return srv.(ProvisionerServer).DriverRevokeBucketAccess(ctx, req.(*DriverRevokeBucketAccessRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
@@ -1802,20 +1938,20 @@ var _Provisioner_serviceDesc = grpc.ServiceDesc{
 	HandlerType: (*ProvisionerServer)(nil),
 	Methods: []grpc.MethodDesc{
 		{
-			MethodName: "ProvisionerCreateBucket",
-			Handler:    _Provisioner_ProvisionerCreateBucket_Handler,
+			MethodName: "DriverCreateBucket",
+			Handler:    _Provisioner_DriverCreateBucket_Handler,
 		},
 		{
-			MethodName: "ProvisionerDeleteBucket",
-			Handler:    _Provisioner_ProvisionerDeleteBucket_Handler,
+			MethodName: "DriverDeleteBucket",
+			Handler:    _Provisioner_DriverDeleteBucket_Handler,
 		},
 		{
-			MethodName: "ProvisionerGrantBucketAccess",
-			Handler:    _Provisioner_ProvisionerGrantBucketAccess_Handler,
+			MethodName: "DriverGrantBucketAccess",
+			Handler:    _Provisioner_DriverGrantBucketAccess_Handler,
 		},
 		{
-			MethodName: "ProvisionerRevokeBucketAccess",
-			Handler:    _Provisioner_ProvisionerRevokeBucketAccess_Handler,
+			MethodName: "DriverRevokeBucketAccess",
+			Handler:    _Provisioner_DriverRevokeBucketAccess_Handler,
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
diff --git a/cosi.pb.json.go b/cosi.pb.json.go
index 57bd9cf..8d30f4f 100644
--- a/cosi.pb.json.go
+++ b/cosi.pb.json.go
@@ -4,259 +4,245 @@
 package cosi
 
 import (
-	"bytes"
-
-	"github.com/golang/protobuf/jsonpb"
+	"google.golang.org/protobuf/encoding/protojson"
 )
 
 // MarshalJSON implements json.Marshaler
 func (msg *S3) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
 func (msg *S3) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
 func (msg *AzureBlob) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
 func (msg *AzureBlob) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
 func (msg *GCS) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
 func (msg *GCS) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
 func (msg *Protocol) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
 func (msg *Protocol) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
+}
+
+// MarshalJSON implements json.Marshaler
+func (msg *CredentialDetails) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
+}
+
+// UnmarshalJSON implements json.Unmarshaler
+func (msg *CredentialDetails) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerGetInfoRequest) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverGetInfoRequest) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerGetInfoRequest) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverGetInfoRequest) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerGetInfoResponse) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverGetInfoResponse) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerGetInfoResponse) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverGetInfoResponse) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerCreateBucketRequest) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverCreateBucketRequest) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerCreateBucketRequest) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverCreateBucketRequest) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerCreateBucketResponse) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverCreateBucketResponse) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerCreateBucketResponse) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverCreateBucketResponse) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerDeleteBucketRequest) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverDeleteBucketRequest) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerDeleteBucketRequest) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverDeleteBucketRequest) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerDeleteBucketResponse) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverDeleteBucketResponse) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerDeleteBucketResponse) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverDeleteBucketResponse) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerGrantBucketAccessRequest) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverGrantBucketAccessRequest) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerGrantBucketAccessRequest) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverGrantBucketAccessRequest) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerGrantBucketAccessResponse) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverGrantBucketAccessResponse) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerGrantBucketAccessResponse) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverGrantBucketAccessResponse) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerRevokeBucketAccessRequest) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverRevokeBucketAccessRequest) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerRevokeBucketAccessRequest) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverRevokeBucketAccessRequest) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
 
 // MarshalJSON implements json.Marshaler
-func (msg *ProvisionerRevokeBucketAccessResponse) MarshalJSON() ([]byte, error) {
-	var buf bytes.Buffer
-	err := (&jsonpb.Marshaler{
-		EnumsAsInts:  false,
-		EmitDefaults: true,
-		OrigName:     false,
-	}).Marshal(&buf, msg)
-	return buf.Bytes(), err
+func (msg *DriverRevokeBucketAccessResponse) MarshalJSON() ([]byte, error) {
+	return protojson.MarshalOptions{
+		UseEnumNumbers:  false,
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}.Marshal(msg)
 }
 
 // UnmarshalJSON implements json.Unmarshaler
-func (msg *ProvisionerRevokeBucketAccessResponse) UnmarshalJSON(b []byte) error {
-	return (&jsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}).Unmarshal(bytes.NewReader(b), msg)
+func (msg *DriverRevokeBucketAccessResponse) UnmarshalJSON(b []byte) error {
+	return protojson.UnmarshalOptions{
+		DiscardUnknown: false,
+	}.Unmarshal(b, msg)
 }
diff --git a/cosi.proto b/cosi.proto
index 29455ec..c9e0a3f 100644
--- a/cosi.proto
+++ b/cosi.proto
@@ -54,8 +54,8 @@ extend google.protobuf.ServiceOptions {
 
 service Identity {
     // This call is meant to retrieve the unique provisioner Identity.
-    // This identity will have to be set in BucketRequest.Provisioner field in order to invoke this specific provisioner.
-    rpc ProvisionerGetInfo (ProvisionerGetInfoRequest) returns (ProvisionerGetInfoResponse) {}
+    // This identity will have to be set in BucketClaim.DriverName field in order to invoke this specific provisioner.
+    rpc DriverGetInfo (DriverGetInfoRequest) returns (DriverGetInfoResponse) {}
 }
 
 service Provisioner {
@@ -63,16 +63,16 @@ service Provisioner {
     // This call is idempotent
     //    1. If a bucket that matches both name and parameters already exists, then OK (success) must be returned.
     //    2. If a bucket by same name, but different parameters is provided, then the appropriate error code ALREADY_EXISTS must be returned.
-    rpc ProvisionerCreateBucket (ProvisionerCreateBucketRequest) returns (ProvisionerCreateBucketResponse) {}
+    rpc DriverCreateBucket (DriverCreateBucketRequest) returns (DriverCreateBucketResponse) {}
     // This call is made to delete the bucket in the backend.
     // If the bucket has already been deleted, then no error should be returned.
-    rpc ProvisionerDeleteBucket (ProvisionerDeleteBucketRequest) returns (ProvisionerDeleteBucketResponse) {}
+    rpc DriverDeleteBucket (DriverDeleteBucketRequest) returns (DriverDeleteBucketResponse) {}
 
     // This call grants access to an account. The account_name in the request shall be used as a unique identifier to create credentials.
-    // The account_id returned in the response will be used as the unique identifier for deleting this access when calling ProvisionerRevokeBucketAccess.
-    rpc ProvisionerGrantBucketAccess (ProvisionerGrantBucketAccessRequest) returns (ProvisionerGrantBucketAccessResponse);
+    // The account_id returned in the response will be used as the unique identifier for deleting this access when calling DriverRevokeBucketAccess.
+    rpc DriverGrantBucketAccess (DriverGrantBucketAccessRequest) returns (DriverGrantBucketAccessResponse);
     // This call revokes all access to a particular bucket from a principal.
-    rpc ProvisionerRevokeBucketAccess (ProvisionerRevokeBucketAccessRequest) returns (ProvisionerRevokeBucketAccessResponse);
+    rpc DriverRevokeBucketAccess (DriverRevokeBucketAccessRequest) returns (DriverRevokeBucketAccessResponse);
 }
 
 // S3SignatureVersion is the version of the signing algorithm for all s3 requests
@@ -96,6 +96,14 @@ enum AnonymousBucketAccessMode {
     ReadWrite = 4;
 }
 
+enum AuthenticationType {
+    UnknownAuthenticationType = 0;
+    // Default, KEY based authentication.
+    Key = 1;
+    // Storageaccount based authentication.
+    IAM = 2;
+}
+
 message S3 {
     // region denotes the geographical region where the S3 server is running
     string region = 1;
@@ -125,11 +133,16 @@ message Protocol {
     }
 }
 
-message ProvisionerGetInfoRequest {
+message CredentialDetails {
+    // map of the details in the secrets for the protocol string
+    map<string, string> secrets = 1;
+}
+
+message DriverGetInfoRequest {
     // Intentionally left blank
 }
 
-message ProvisionerGetInfoResponse {    
+message DriverGetInfoResponse {
     // This field is REQUIRED
     // The name MUST follow domain name notation format
     // (https://tools.ietf.org/html/rfc1035#section-2.3.1). It SHOULD
@@ -141,53 +154,52 @@ message ProvisionerGetInfoResponse {
     string name = 1;
 }
 
-message ProvisionerCreateBucketRequest {    
+message DriverCreateBucketRequest {
     // This field is REQUIRED
     // name specifies the name of the bucket that should be created.
     string name = 1;
 
-    // This field is REQUIRED
-    // Protocol specific information required by the call is passed in as key,value pairs.
-    Protocol protocol = 2;
-
     // This field is OPTIONAL
     // The caller should treat the values in parameters as opaque. 
     // The receiver is responsible for parsing and validating the values.
-    map<string,string> parameters = 3;
+    map<string,string> parameters = 2;
 }
 
-message ProvisionerCreateBucketResponse {
+message DriverCreateBucketResponse {
     // bucket_id returned here is expected to be the globally unique 
-    // identifier for the bucket in the object storage provider 
+    // identifier for the bucket in the object storage provider.
     string bucket_id = 1;
+
+    // bucket_info returned here stores the data specific to the
+    // bucket required by the object storage provider to connect to the bucket.
+    Protocol bucket_info = 2;
 }
 
-message ProvisionerDeleteBucketRequest {
+message DriverDeleteBucketRequest {
     // This field is REQUIRED
     // bucket_id is a globally unique identifier for the bucket
     // in the object storage provider 
     string bucket_id = 1;
 }
 
-message ProvisionerDeleteBucketResponse {
+message DriverDeleteBucketResponse {
     // Intentionally left blank
 }
 
-message ProvisionerGrantBucketAccessRequest {
+message DriverGrantBucketAccessRequest {
     // This field is REQUIRED
     // bucket_id is a globally unique identifier for the bucket
     // in the object storage provider 
     string bucket_id = 1;
 
     // This field is REQUIRED
-    // account_name is a identifier for object storage provider 
-    // to ensure that multiple requests for the same account
-    // result in only one access token being created
-    string account_name = 2;
+    // name field is used to define the name of the bucket access object.
+    string name = 2;
 
     // This field is REQUIRED
-    // Requested Access policy, ex: {"Effect":"Allow","Action":"s3:PutObject","Resource":"arn:aws:s3:::profilepics/*"}
-    string access_policy = 3;
+    // Requested authentication type for the bucket access.
+    // Supported authentication types are KEY or IAM.
+    AuthenticationType authentication_type = 3;
 
     // This field is OPTIONAL
     // The caller should treat the values in parameters as opaque. 
@@ -195,18 +207,18 @@ message ProvisionerGrantBucketAccessRequest {
     map<string,string> parameters = 4;
 }
 
-message ProvisionerGrantBucketAccessResponse {
-    // This field is OPTIONAL
+message DriverGrantBucketAccessResponse {
+    // This field is REQUIRED
     // This is the account_id that is being provided access. This will
     // be required later to revoke access. 
     string account_id = 1;
 
-    // This field is OPTIONAL
+    // This field is REQUIRED
     // Credentials supplied for accessing the bucket ex: aws access key id and secret, etc.
-    string credentials = 2;
+    map<string, CredentialDetails> credentials = 2;
 }
 
-message ProvisionerRevokeBucketAccessRequest {
+message DriverRevokeBucketAccessRequest {
     // This field is REQUIRED
     // bucket_id is a globally unique identifier for the bucket
     // in the object storage provider.
@@ -217,7 +229,7 @@ message ProvisionerRevokeBucketAccessRequest {
     string account_id = 2;
 }
 
-message ProvisionerRevokeBucketAccessResponse {
+message DriverRevokeBucketAccessResponse {
     // Intentionally left blank
 }
 
diff --git a/fake/cosi.pb.fake.go b/fake/cosi.pb.fake.go
index 3e14247..170bedb 100644
--- a/fake/cosi.pb.fake.go
+++ b/fake/cosi.pb.fake.go
@@ -7,29 +7,29 @@ import (
 )
 
 type FakeIdentityClient struct {
-	FakeProvisionerGetInfo func(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerGetInfoRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerGetInfoResponse, error)
+	FakeDriverGetInfo func(ctx context.Context, in *containerobjectstorageinterfacespec.DriverGetInfoRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverGetInfoResponse, error)
 }
 
-func (f *FakeIdentityClient) ProvisionerGetInfo(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerGetInfoRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerGetInfoResponse, error) {
-	return f.FakeProvisionerGetInfo(ctx, in, opts...)
+func (f *FakeIdentityClient) DriverGetInfo(ctx context.Context, in *containerobjectstorageinterfacespec.DriverGetInfoRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverGetInfoResponse, error) {
+	return f.FakeDriverGetInfo(ctx, in, opts...)
 }
 
 type FakeProvisionerClient struct {
-	FakeProvisionerCreateBucket       func(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerCreateBucketRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerCreateBucketResponse, error)
-	FakeProvisionerDeleteBucket       func(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerDeleteBucketRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerDeleteBucketResponse, error)
-	FakeProvisionerGrantBucketAccess  func(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerGrantBucketAccessRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerGrantBucketAccessResponse, error)
-	FakeProvisionerRevokeBucketAccess func(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerRevokeBucketAccessRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerRevokeBucketAccessResponse, error)
+	FakeDriverCreateBucket       func(ctx context.Context, in *containerobjectstorageinterfacespec.DriverCreateBucketRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverCreateBucketResponse, error)
+	FakeDriverDeleteBucket       func(ctx context.Context, in *containerobjectstorageinterfacespec.DriverDeleteBucketRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverDeleteBucketResponse, error)
+	FakeDriverGrantBucketAccess  func(ctx context.Context, in *containerobjectstorageinterfacespec.DriverGrantBucketAccessRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverGrantBucketAccessResponse, error)
+	FakeDriverRevokeBucketAccess func(ctx context.Context, in *containerobjectstorageinterfacespec.DriverRevokeBucketAccessRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverRevokeBucketAccessResponse, error)
 }
 
-func (f *FakeProvisionerClient) ProvisionerCreateBucket(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerCreateBucketRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerCreateBucketResponse, error) {
-	return f.FakeProvisionerCreateBucket(ctx, in, opts...)
+func (f *FakeProvisionerClient) DriverCreateBucket(ctx context.Context, in *containerobjectstorageinterfacespec.DriverCreateBucketRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverCreateBucketResponse, error) {
+	return f.FakeDriverCreateBucket(ctx, in, opts...)
 }
-func (f *FakeProvisionerClient) ProvisionerDeleteBucket(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerDeleteBucketRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerDeleteBucketResponse, error) {
-	return f.FakeProvisionerDeleteBucket(ctx, in, opts...)
+func (f *FakeProvisionerClient) DriverDeleteBucket(ctx context.Context, in *containerobjectstorageinterfacespec.DriverDeleteBucketRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverDeleteBucketResponse, error) {
+	return f.FakeDriverDeleteBucket(ctx, in, opts...)
 }
-func (f *FakeProvisionerClient) ProvisionerGrantBucketAccess(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerGrantBucketAccessRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerGrantBucketAccessResponse, error) {
-	return f.FakeProvisionerGrantBucketAccess(ctx, in, opts...)
+func (f *FakeProvisionerClient) DriverGrantBucketAccess(ctx context.Context, in *containerobjectstorageinterfacespec.DriverGrantBucketAccessRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverGrantBucketAccessResponse, error) {
+	return f.FakeDriverGrantBucketAccess(ctx, in, opts...)
 }
-func (f *FakeProvisionerClient) ProvisionerRevokeBucketAccess(ctx context.Context, in *containerobjectstorageinterfacespec.ProvisionerRevokeBucketAccessRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.ProvisionerRevokeBucketAccessResponse, error) {
-	return f.FakeProvisionerRevokeBucketAccess(ctx, in, opts...)
+func (f *FakeProvisionerClient) DriverRevokeBucketAccess(ctx context.Context, in *containerobjectstorageinterfacespec.DriverRevokeBucketAccessRequest, opts ...grpc.CallOption) (*containerobjectstorageinterfacespec.DriverRevokeBucketAccessResponse, error) {
+	return f.FakeDriverRevokeBucketAccess(ctx, in, opts...)
 }
diff --git a/go.mod b/go.mod
index 9840363..ad3d543 100644
--- a/go.mod
+++ b/go.mod
@@ -1,11 +1,19 @@
 module sigs.k8s.io/container-object-storage-interface-spec
 
-go 1.15
+go 1.18
 
 require (
 	github.com/dave/jennifer v1.4.1
 	github.com/golang/protobuf v1.4.3
-	golang.org/x/net v0.0.0-20191002035440-2ec189313ef0 // indirect
 	google.golang.org/grpc v1.35.0
 	google.golang.org/protobuf v1.25.0
 )
+
+require (
+	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect
+	github.com/mitchellh/protoc-gen-go-json v1.1.0 // indirect
+	golang.org/x/net v0.0.0-20191002035440-2ec189313ef0 // indirect
+	golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a // indirect
+	golang.org/x/text v0.3.0 // indirect
+	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 // indirect
+)
diff --git a/go.sum b/go.sum
index ac6afbc..7d412c5 100644
--- a/go.sum
+++ b/go.sum
@@ -31,9 +31,12 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.0 h1:/QaMHBdZ26BB3SSst0Iwl10Epc+xhTquomWX0oZEB6w=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/mitchellh/protoc-gen-go-json v1.1.0 h1:lEi1xtXyYKDwA8EB5u27+UUZOTznC4JpqVOKZwCGJUo=
+github.com/mitchellh/protoc-gen-go-json v1.1.0/go.mod h1:pACAKlMtBf4SMFbVswcjwNwWwlci6Vn841H5jPRcE9I=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
diff --git a/spec.md b/spec.md
index 8f3e548..953eb70 100644
--- a/spec.md
+++ b/spec.md
@@ -181,8 +181,8 @@ extend google.protobuf.ServiceOptions {
 
 service Identity {
     // This call is meant to retrieve the unique provisioner Identity.
-    // This identity will have to be set in BucketRequest.Provisioner field in order to invoke this specific provisioner.
-    rpc ProvisionerGetInfo (ProvisionerGetInfoRequest) returns (ProvisionerGetInfoResponse) {}
+    // This identity will have to be set in BucketClaim.DriverName field in order to invoke this specific provisioner.
+    rpc DriverGetInfo (DriverGetInfoRequest) returns (DriverGetInfoResponse) {}
 }
 
 service Provisioner {
@@ -190,16 +190,16 @@ service Provisioner {
     // This call is idempotent
     //    1. If a bucket that matches both name and parameters already exists, then OK (success) must be returned.
     //    2. If a bucket by same name, but different parameters is provided, then the appropriate error code ALREADY_EXISTS must be returned.
-    rpc ProvisionerCreateBucket (ProvisionerCreateBucketRequest) returns (ProvisionerCreateBucketResponse) {}
+    rpc DriverCreateBucket (DriverCreateBucketRequest) returns (DriverCreateBucketResponse) {}
     // This call is made to delete the bucket in the backend.
     // If the bucket has already been deleted, then no error should be returned.
-    rpc ProvisionerDeleteBucket (ProvisionerDeleteBucketRequest) returns (ProvisionerDeleteBucketResponse) {}
+    rpc DriverDeleteBucket (DriverDeleteBucketRequest) returns (DriverDeleteBucketResponse) {}
 
     // This call grants access to an account. The account_name in the request shall be used as a unique identifier to create credentials.
-    // The account_id returned in the response will be used as the unique identifier for deleting this access when calling ProvisionerRevokeBucketAccess.
-    rpc ProvisionerGrantBucketAccess (ProvisionerGrantBucketAccessRequest) returns (ProvisionerGrantBucketAccessResponse);
+    // The account_id returned in the response will be used as the unique identifier for deleting this access when calling DriverRevokeBucketAccess.
+    rpc DriverGrantBucketAccess (DriverGrantBucketAccessRequest) returns (DriverGrantBucketAccessResponse);
     // This call revokes all access to a particular bucket from a principal.
-    rpc ProvisionerRevokeBucketAccess (ProvisionerRevokeBucketAccessRequest) returns (ProvisionerRevokeBucketAccessResponse);
+    rpc DriverRevokeBucketAccess (DriverRevokeBucketAccessRequest) returns (DriverRevokeBucketAccessResponse);
 }
 
 // S3SignatureVersion is the version of the signing algorithm for all s3 requests
@@ -223,6 +223,14 @@ enum AnonymousBucketAccessMode {
     ReadWrite = 4;
 }
 
+enum AuthenticationType {
+    UnknownAuthenticationType = 0;
+    // Default, KEY based authentication.
+    Key = 1;
+    // Storageaccount based authentication.
+    IAM = 2;
+}
+
 message S3 {
     // region denotes the geographical region where the S3 server is running
     string region = 1;
@@ -252,11 +260,16 @@ message Protocol {
     }
 }
 
-message ProvisionerGetInfoRequest {
+message CredentialDetails {
+    // map of the details in the secrets for the protocol string
+    map<string, string> secrets = 1;
+}
+
+message DriverGetInfoRequest {
     // Intentionally left blank
 }
 
-message ProvisionerGetInfoResponse {    
+message DriverGetInfoResponse {
     // This field is REQUIRED
     // The name MUST follow domain name notation format
     // (https://tools.ietf.org/html/rfc1035#section-2.3.1). It SHOULD
@@ -268,53 +281,52 @@ message ProvisionerGetInfoResponse {
     string name = 1;
 }
 
-message ProvisionerCreateBucketRequest {    
+message DriverCreateBucketRequest {
     // This field is REQUIRED
     // name specifies the name of the bucket that should be created.
     string name = 1;
 
-    // This field is REQUIRED
-    // Protocol specific information required by the call is passed in as key,value pairs.
-    Protocol protocol = 2;
-
     // This field is OPTIONAL
     // The caller should treat the values in parameters as opaque. 
     // The receiver is responsible for parsing and validating the values.
-    map<string,string> parameters = 3;
+    map<string,string> parameters = 2;
 }
 
-message ProvisionerCreateBucketResponse {
+message DriverCreateBucketResponse {
     // bucket_id returned here is expected to be the globally unique 
-    // identifier for the bucket in the object storage provider 
+    // identifier for the bucket in the object storage provider.
     string bucket_id = 1;
+
+    // bucket_info returned here stores the data specific to the
+    // bucket required by the object storage provider to connect to the bucket.
+    Protocol bucket_info = 2;
 }
 
-message ProvisionerDeleteBucketRequest {
+message DriverDeleteBucketRequest {
     // This field is REQUIRED
     // bucket_id is a globally unique identifier for the bucket
     // in the object storage provider 
     string bucket_id = 1;
 }
 
-message ProvisionerDeleteBucketResponse {
+message DriverDeleteBucketResponse {
     // Intentionally left blank
 }
 
-message ProvisionerGrantBucketAccessRequest {
+message DriverGrantBucketAccessRequest {
     // This field is REQUIRED
     // bucket_id is a globally unique identifier for the bucket
     // in the object storage provider 
     string bucket_id = 1;
 
     // This field is REQUIRED
-    // account_name is a identifier for object storage provider 
-    // to ensure that multiple requests for the same account
-    // result in only one access token being created
-    string account_name = 2;
+    // name field is used to define the name of the bucket access object.
+    string name = 2;
 
     // This field is REQUIRED
-    // Requested Access policy, ex: {"Effect":"Allow","Action":"s3:PutObject","Resource":"arn:aws:s3:::profilepics/*"}
-    string access_policy = 3;
+    // Requested authentication type for the bucket access.
+    // Supported authentication types are KEY or IAM.
+    AuthenticationType authentication_type = 3;
 
     // This field is OPTIONAL
     // The caller should treat the values in parameters as opaque. 
@@ -322,18 +334,18 @@ message ProvisionerGrantBucketAccessRequest {
     map<string,string> parameters = 4;
 }
 
-message ProvisionerGrantBucketAccessResponse {
-    // This field is OPTIONAL
+message DriverGrantBucketAccessResponse {
+    // This field is REQUIRED
     // This is the account_id that is being provided access. This will
     // be required later to revoke access. 
     string account_id = 1;
 
-    // This field is OPTIONAL
+    // This field is REQUIRED
     // Credentials supplied for accessing the bucket ex: aws access key id and secret, etc.
-    string credentials = 2;
+    map<string, CredentialDetails> credentials = 2;
 }
 
-message ProvisionerRevokeBucketAccessRequest {
+message DriverRevokeBucketAccessRequest {
     // This field is REQUIRED
     // bucket_id is a globally unique identifier for the bucket
     // in the object storage provider.
@@ -344,7 +356,7 @@ message ProvisionerRevokeBucketAccessRequest {
     string account_id = 2;
 }
 
-message ProvisionerRevokeBucketAccessResponse {
+message DriverRevokeBucketAccessResponse {
     // Intentionally left blank
 }
 
@@ -419,36 +431,31 @@ The general flow of the success case MAY be as follows (protos illustrated in YA
 1. COSI system queries metadata via Identity RPC.
 
 ```
-   # COSI system --(ProvisionerGetInfo)--> Plugin
+   # COSI system --(DriverGetInfo)--> Plugin
    request:
    response:
       name: org.foo.whizbang.super-plugin
-      version: blue-green
-      manifest:
-        baz: qaz
 ```
 ```
-message ProvisionerGetInfoRequest {
+message DriverGetInfoRequest {
     // Intentionally left blank
 }
 
-message ProvisionerGetInfoResponse {    
+message DriverGetInfoResponse {
     string name = 1;
-    string version = 2;
-    map<string,string> manifest = 3;
 }
 ```
 
-#### `ProvisionerCreateBucket`
+#### `DriverCreateBucket`
 
 A Controller Plugin MUST implement this RPC call.
 This RPC will be called by the COSI system to provision a new bucket on behalf of a COSI user.
 
 This operation MUST be idempotent.
-If a volume corresponding to the specified bucket `name` already exists, is accessible from `accessibility_requirements, and is compatible with the specified attributes of the bucket in the `ProvisionerCreateBucket`, the Plugin MUST reply `0 OK` with the corresponding `ProvisionerCreateBucketResponse`.
+If a volume corresponding to the specified bucket `name` already exists, is accessible from `accessibility_requirements, and is compatible with the specified attributes of the bucket in the `DriverCreateBucket`, the Plugin MUST reply `0 OK` with the corresponding `DriverCreateBucketResponse`.
 
 ```
-message ProvisionerCreateBucketRequest {  
+message DriverCreateBucketRequest {  
     // Idempotency - This name is generated by the COSI system to achieve
     // idempotency.  
     // This field is REQUIRED.
@@ -459,7 +466,7 @@ message ProvisionerCreateBucketRequest {
     map<string,string> bucket_context = 2;
 }
 
-message ProvisionerCreateBucketResponse {
+message DriverCreateBucketResponse {
     // Intentionally left blank
 }