diff --git a/api/gen/proto/go/kmsintercom/kmsintercom.pb.go b/api/gen/proto/go/kmsintercom/kmsintercom.pb.go
index c68ea38a3932ac85f31f42d3c0a67f5fc1f2c1ba..d990f2d156f73a47bcc5b969c900de9e89d96a9f 100644
--- a/api/gen/proto/go/kmsintercom/kmsintercom.pb.go
+++ b/api/gen/proto/go/kmsintercom/kmsintercom.pb.go
@@ -196,6 +196,124 @@ func (x *SyncQkdBulkRequest) GetBulkId() []int64 {
 	return nil
 }
 
+type SyncKeyIdsForBulkRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Timestamp    int64    `protobuf:"varint,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	InterComAddr string   `protobuf:"bytes,2,opt,name=interComAddr,proto3" json:"interComAddr,omitempty"`
+	BulkId       int64    `protobuf:"varint,3,opt,name=bulkId,proto3" json:"bulkId,omitempty"`
+	KeyId        []string `protobuf:"bytes,4,rep,name=keyId,proto3" json:"keyId,omitempty"`
+}
+
+func (x *SyncKeyIdsForBulkRequest) Reset() {
+	*x = SyncKeyIdsForBulkRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *SyncKeyIdsForBulkRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SyncKeyIdsForBulkRequest) ProtoMessage() {}
+
+func (x *SyncKeyIdsForBulkRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[3]
+	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 SyncKeyIdsForBulkRequest.ProtoReflect.Descriptor instead.
+func (*SyncKeyIdsForBulkRequest) Descriptor() ([]byte, []int) {
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *SyncKeyIdsForBulkRequest) GetTimestamp() int64 {
+	if x != nil {
+		return x.Timestamp
+	}
+	return 0
+}
+
+func (x *SyncKeyIdsForBulkRequest) GetInterComAddr() string {
+	if x != nil {
+		return x.InterComAddr
+	}
+	return ""
+}
+
+func (x *SyncKeyIdsForBulkRequest) GetBulkId() int64 {
+	if x != nil {
+		return x.BulkId
+	}
+	return 0
+}
+
+func (x *SyncKeyIdsForBulkRequest) GetKeyId() []string {
+	if x != nil {
+		return x.KeyId
+	}
+	return nil
+}
+
+type SyncKeyIdsForBulkResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Timestamp int64 `protobuf:"varint,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+}
+
+func (x *SyncKeyIdsForBulkResponse) Reset() {
+	*x = SyncKeyIdsForBulkResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *SyncKeyIdsForBulkResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SyncKeyIdsForBulkResponse) ProtoMessage() {}
+
+func (x *SyncKeyIdsForBulkResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[4]
+	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 SyncKeyIdsForBulkResponse.ProtoReflect.Descriptor instead.
+func (*SyncKeyIdsForBulkResponse) Descriptor() ([]byte, []int) {
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *SyncKeyIdsForBulkResponse) GetTimestamp() int64 {
+	if x != nil {
+		return x.Timestamp
+	}
+	return 0
+}
+
 type SyncQkdBulkResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -208,7 +326,7 @@ type SyncQkdBulkResponse struct {
 func (x *SyncQkdBulkResponse) Reset() {
 	*x = SyncQkdBulkResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[3]
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -221,7 +339,7 @@ func (x *SyncQkdBulkResponse) String() string {
 func (*SyncQkdBulkResponse) ProtoMessage() {}
 
 func (x *SyncQkdBulkResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[3]
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -234,7 +352,7 @@ func (x *SyncQkdBulkResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SyncQkdBulkResponse.ProtoReflect.Descriptor instead.
 func (*SyncQkdBulkResponse) Descriptor() ([]byte, []int) {
-	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{3}
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *SyncQkdBulkResponse) GetTimestamp() int64 {
@@ -259,13 +377,13 @@ type InterComTransportKeyNegotiationRequest struct {
 
 	Timestamp int64  `protobuf:"varint,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
 	PathID    string `protobuf:"bytes,2,opt,name=pathID,proto3" json:"pathID,omitempty"`
-	KeyToUse  uint64 `protobuf:"varint,3,opt,name=keyToUse,proto3" json:"keyToUse,omitempty"`
+	KeyToUse  string `protobuf:"bytes,3,opt,name=keyToUse,proto3" json:"keyToUse,omitempty"`
 }
 
 func (x *InterComTransportKeyNegotiationRequest) Reset() {
 	*x = InterComTransportKeyNegotiationRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[4]
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -278,7 +396,7 @@ func (x *InterComTransportKeyNegotiationRequest) String() string {
 func (*InterComTransportKeyNegotiationRequest) ProtoMessage() {}
 
 func (x *InterComTransportKeyNegotiationRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[4]
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -291,7 +409,7 @@ func (x *InterComTransportKeyNegotiationRequest) ProtoReflect() protoreflect.Mes
 
 // Deprecated: Use InterComTransportKeyNegotiationRequest.ProtoReflect.Descriptor instead.
 func (*InterComTransportKeyNegotiationRequest) Descriptor() ([]byte, []int) {
-	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{4}
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *InterComTransportKeyNegotiationRequest) GetTimestamp() int64 {
@@ -308,11 +426,11 @@ func (x *InterComTransportKeyNegotiationRequest) GetPathID() string {
 	return ""
 }
 
-func (x *InterComTransportKeyNegotiationRequest) GetKeyToUse() uint64 {
+func (x *InterComTransportKeyNegotiationRequest) GetKeyToUse() string {
 	if x != nil {
 		return x.KeyToUse
 	}
-	return 0
+	return ""
 }
 
 type InterComTransportKeyNegotiationResponse struct {
@@ -326,7 +444,7 @@ type InterComTransportKeyNegotiationResponse struct {
 func (x *InterComTransportKeyNegotiationResponse) Reset() {
 	*x = InterComTransportKeyNegotiationResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[5]
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -339,7 +457,7 @@ func (x *InterComTransportKeyNegotiationResponse) String() string {
 func (*InterComTransportKeyNegotiationResponse) ProtoMessage() {}
 
 func (x *InterComTransportKeyNegotiationResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[5]
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -352,7 +470,7 @@ func (x *InterComTransportKeyNegotiationResponse) ProtoReflect() protoreflect.Me
 
 // Deprecated: Use InterComTransportKeyNegotiationResponse.ProtoReflect.Descriptor instead.
 func (*InterComTransportKeyNegotiationResponse) Descriptor() ([]byte, []int) {
-	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{5}
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *InterComTransportKeyNegotiationResponse) GetTimestamp() int64 {
@@ -375,7 +493,7 @@ type KeyForwardingRequest struct {
 func (x *KeyForwardingRequest) Reset() {
 	*x = KeyForwardingRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[6]
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -388,7 +506,7 @@ func (x *KeyForwardingRequest) String() string {
 func (*KeyForwardingRequest) ProtoMessage() {}
 
 func (x *KeyForwardingRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[6]
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -401,7 +519,7 @@ func (x *KeyForwardingRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KeyForwardingRequest.ProtoReflect.Descriptor instead.
 func (*KeyForwardingRequest) Descriptor() ([]byte, []int) {
-	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{6}
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *KeyForwardingRequest) GetTimestamp() int64 {
@@ -436,7 +554,7 @@ type KeyForwardingResponse struct {
 func (x *KeyForwardingResponse) Reset() {
 	*x = KeyForwardingResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[7]
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -449,7 +567,7 @@ func (x *KeyForwardingResponse) String() string {
 func (*KeyForwardingResponse) ProtoMessage() {}
 
 func (x *KeyForwardingResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[7]
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -462,7 +580,7 @@ func (x *KeyForwardingResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KeyForwardingResponse.ProtoReflect.Descriptor instead.
 func (*KeyForwardingResponse) Descriptor() ([]byte, []int) {
-	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{7}
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *KeyForwardingResponse) GetTimestamp() int64 {
@@ -485,7 +603,7 @@ type KeyIdNotificationRequest struct {
 func (x *KeyIdNotificationRequest) Reset() {
 	*x = KeyIdNotificationRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[8]
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -498,7 +616,7 @@ func (x *KeyIdNotificationRequest) String() string {
 func (*KeyIdNotificationRequest) ProtoMessage() {}
 
 func (x *KeyIdNotificationRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[8]
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -511,7 +629,7 @@ func (x *KeyIdNotificationRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KeyIdNotificationRequest.ProtoReflect.Descriptor instead.
 func (*KeyIdNotificationRequest) Descriptor() ([]byte, []int) {
-	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{8}
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *KeyIdNotificationRequest) GetTimestamp() int64 {
@@ -546,7 +664,7 @@ type KeyIdNotificationResponse struct {
 func (x *KeyIdNotificationResponse) Reset() {
 	*x = KeyIdNotificationResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[9]
+		mi := &file_kmsintercom_kmsintercom_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -559,7 +677,7 @@ func (x *KeyIdNotificationResponse) String() string {
 func (*KeyIdNotificationResponse) ProtoMessage() {}
 
 func (x *KeyIdNotificationResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[9]
+	mi := &file_kmsintercom_kmsintercom_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -572,7 +690,7 @@ func (x *KeyIdNotificationResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use KeyIdNotificationResponse.ProtoReflect.Descriptor instead.
 func (*KeyIdNotificationResponse) Descriptor() ([]byte, []int) {
-	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{9}
+	return file_kmsintercom_kmsintercom_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *KeyIdNotificationResponse) GetTimestamp() int64 {
@@ -606,90 +724,109 @@ var file_kmsintercom_kmsintercom_proto_rawDesc = []byte{
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-	0x02, 0x17, 0x4b, 0x6d, 0x73, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0x5c, 0x47, 0x50,
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-	0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
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+	0x74, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x34, 0x2e, 0x6b, 0x6d,
+	0x73, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x43,
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+	0x67, 0x6f, 0x74, 0x69, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73,
+	0x65, 0x22, 0x00, 0x12, 0x58, 0x0a, 0x0d, 0x4b, 0x65, 0x79, 0x46, 0x6f, 0x72, 0x77, 0x61, 0x72,
+	0x64, 0x69, 0x6e, 0x67, 0x12, 0x21, 0x2e, 0x6b, 0x6d, 0x73, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x63,
+	0x6f, 0x6d, 0x2e, 0x4b, 0x65, 0x79, 0x46, 0x6f, 0x72, 0x77, 0x61, 0x72, 0x64, 0x69, 0x6e, 0x67,
+	0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x22, 0x2e, 0x6b, 0x6d, 0x73, 0x69, 0x6e, 0x74,
+	0x65, 0x72, 0x63, 0x6f, 0x6d, 0x2e, 0x4b, 0x65, 0x79, 0x46, 0x6f, 0x72, 0x77, 0x61, 0x72, 0x64,
+	0x69, 0x6e, 0x67, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x64, 0x0a,
+	0x11, 0x4b, 0x65, 0x79, 0x49, 0x64, 0x4e, 0x6f, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69,
+	0x6f, 0x6e, 0x12, 0x25, 0x2e, 0x6b, 0x6d, 0x73, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d,
+	0x2e, 0x4b, 0x65, 0x79, 0x49, 0x64, 0x4e, 0x6f, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69,
+	0x6f, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x26, 0x2e, 0x6b, 0x6d, 0x73, 0x69,
+	0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0x2e, 0x4b, 0x65, 0x79, 0x49, 0x64, 0x4e, 0x6f, 0x74,
+	0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73,
+	0x65, 0x22, 0x00, 0x42, 0xaf, 0x01, 0x0a, 0x0f, 0x63, 0x6f, 0x6d, 0x2e, 0x6b, 0x6d, 0x73, 0x69,
+	0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0x42, 0x10, 0x4b, 0x6d, 0x73, 0x69, 0x6e, 0x74, 0x65,
+	0x72, 0x63, 0x6f, 0x6d, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x3e, 0x63, 0x6f, 0x64,
+	0x65, 0x2e, 0x66, 0x62, 0x69, 0x2e, 0x68, 0x2d, 0x64, 0x61, 0x2e, 0x64, 0x65, 0x2f, 0x64, 0x65,
+	0x6d, 0x6f, 0x71, 0x75, 0x61, 0x6e, 0x64, 0x74, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2d, 0x6b,
+	0x6d, 0x73, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x2f,
+	0x6b, 0x6d, 0x73, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0xa2, 0x02, 0x03, 0x4b, 0x58,
+	0x58, 0xaa, 0x02, 0x0b, 0x4b, 0x6d, 0x73, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0xca,
+	0x02, 0x0b, 0x4b, 0x6d, 0x73, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0xe2, 0x02, 0x17,
+	0x4b, 0x6d, 0x73, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x63, 0x6f, 0x6d, 0x5c, 0x47, 0x50, 0x42, 0x4d,
+	0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0xea, 0x02, 0x0b, 0x4b, 0x6d, 0x73, 0x69, 0x6e, 0x74,
+	0x65, 0x72, 0x63, 0x6f, 0x6d, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -704,35 +841,39 @@ func file_kmsintercom_kmsintercom_proto_rawDescGZIP() []byte {
 	return file_kmsintercom_kmsintercom_proto_rawDescData
 }
 
-var file_kmsintercom_kmsintercom_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
+var file_kmsintercom_kmsintercom_proto_msgTypes = make([]protoimpl.MessageInfo, 12)
 var file_kmsintercom_kmsintercom_proto_goTypes = []interface{}{
 	(*InterComCapabilitiesRequest)(nil),             // 0: kmsintercom.InterComCapabilitiesRequest
 	(*InterComCapabilitiesReply)(nil),               // 1: kmsintercom.InterComCapabilitiesReply
 	(*SyncQkdBulkRequest)(nil),                      // 2: kmsintercom.SyncQkdBulkRequest
-	(*SyncQkdBulkResponse)(nil),                     // 3: kmsintercom.SyncQkdBulkResponse
-	(*InterComTransportKeyNegotiationRequest)(nil),  // 4: kmsintercom.InterComTransportKeyNegotiationRequest
-	(*InterComTransportKeyNegotiationResponse)(nil), // 5: kmsintercom.InterComTransportKeyNegotiationResponse
-	(*KeyForwardingRequest)(nil),                    // 6: kmsintercom.KeyForwardingRequest
-	(*KeyForwardingResponse)(nil),                   // 7: kmsintercom.KeyForwardingResponse
-	(*KeyIdNotificationRequest)(nil),                // 8: kmsintercom.KeyIdNotificationRequest
-	(*KeyIdNotificationResponse)(nil),               // 9: kmsintercom.KeyIdNotificationResponse
+	(*SyncKeyIdsForBulkRequest)(nil),                // 3: kmsintercom.SyncKeyIdsForBulkRequest
+	(*SyncKeyIdsForBulkResponse)(nil),               // 4: kmsintercom.SyncKeyIdsForBulkResponse
+	(*SyncQkdBulkResponse)(nil),                     // 5: kmsintercom.SyncQkdBulkResponse
+	(*InterComTransportKeyNegotiationRequest)(nil),  // 6: kmsintercom.InterComTransportKeyNegotiationRequest
+	(*InterComTransportKeyNegotiationResponse)(nil), // 7: kmsintercom.InterComTransportKeyNegotiationResponse
+	(*KeyForwardingRequest)(nil),                    // 8: kmsintercom.KeyForwardingRequest
+	(*KeyForwardingResponse)(nil),                   // 9: kmsintercom.KeyForwardingResponse
+	(*KeyIdNotificationRequest)(nil),                // 10: kmsintercom.KeyIdNotificationRequest
+	(*KeyIdNotificationResponse)(nil),               // 11: kmsintercom.KeyIdNotificationResponse
 }
 var file_kmsintercom_kmsintercom_proto_depIdxs = []int32{
-	0, // 0: kmsintercom.KmsTalker.InterComCapabilities:input_type -> kmsintercom.InterComCapabilitiesRequest
-	2, // 1: kmsintercom.KmsTalker.SyncQkdBulk:input_type -> kmsintercom.SyncQkdBulkRequest
-	4, // 2: kmsintercom.KmsTalker.InterComTransportKeyNegotiation:input_type -> kmsintercom.InterComTransportKeyNegotiationRequest
-	6, // 3: kmsintercom.KmsTalker.KeyForwarding:input_type -> kmsintercom.KeyForwardingRequest
-	8, // 4: kmsintercom.KmsTalker.KeyIdNotification:input_type -> kmsintercom.KeyIdNotificationRequest
-	1, // 5: kmsintercom.KmsTalker.InterComCapabilities:output_type -> kmsintercom.InterComCapabilitiesReply
-	3, // 6: kmsintercom.KmsTalker.SyncQkdBulk:output_type -> kmsintercom.SyncQkdBulkResponse
-	5, // 7: kmsintercom.KmsTalker.InterComTransportKeyNegotiation:output_type -> kmsintercom.InterComTransportKeyNegotiationResponse
-	7, // 8: kmsintercom.KmsTalker.KeyForwarding:output_type -> kmsintercom.KeyForwardingResponse
-	9, // 9: kmsintercom.KmsTalker.KeyIdNotification:output_type -> kmsintercom.KeyIdNotificationResponse
-	5, // [5:10] is the sub-list for method output_type
-	0, // [0:5] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	0,  // 0: kmsintercom.KmsTalker.InterComCapabilities:input_type -> kmsintercom.InterComCapabilitiesRequest
+	2,  // 1: kmsintercom.KmsTalker.SyncQkdBulk:input_type -> kmsintercom.SyncQkdBulkRequest
+	3,  // 2: kmsintercom.KmsTalker.SyncKeyIdsForBulk:input_type -> kmsintercom.SyncKeyIdsForBulkRequest
+	6,  // 3: kmsintercom.KmsTalker.InterComTransportKeyNegotiation:input_type -> kmsintercom.InterComTransportKeyNegotiationRequest
+	8,  // 4: kmsintercom.KmsTalker.KeyForwarding:input_type -> kmsintercom.KeyForwardingRequest
+	10, // 5: kmsintercom.KmsTalker.KeyIdNotification:input_type -> kmsintercom.KeyIdNotificationRequest
+	1,  // 6: kmsintercom.KmsTalker.InterComCapabilities:output_type -> kmsintercom.InterComCapabilitiesReply
+	5,  // 7: kmsintercom.KmsTalker.SyncQkdBulk:output_type -> kmsintercom.SyncQkdBulkResponse
+	4,  // 8: kmsintercom.KmsTalker.SyncKeyIdsForBulk:output_type -> kmsintercom.SyncKeyIdsForBulkResponse
+	7,  // 9: kmsintercom.KmsTalker.InterComTransportKeyNegotiation:output_type -> kmsintercom.InterComTransportKeyNegotiationResponse
+	9,  // 10: kmsintercom.KmsTalker.KeyForwarding:output_type -> kmsintercom.KeyForwardingResponse
+	11, // 11: kmsintercom.KmsTalker.KeyIdNotification:output_type -> kmsintercom.KeyIdNotificationResponse
+	6,  // [6:12] is the sub-list for method output_type
+	0,  // [0:6] is the sub-list for method input_type
+	0,  // [0:0] is the sub-list for extension type_name
+	0,  // [0:0] is the sub-list for extension extendee
+	0,  // [0:0] is the sub-list for field type_name
 }
 
 func init() { file_kmsintercom_kmsintercom_proto_init() }
@@ -778,7 +919,7 @@ func file_kmsintercom_kmsintercom_proto_init() {
 			}
 		}
 		file_kmsintercom_kmsintercom_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*SyncQkdBulkResponse); i {
+			switch v := v.(*SyncKeyIdsForBulkRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -790,7 +931,7 @@ func file_kmsintercom_kmsintercom_proto_init() {
 			}
 		}
 		file_kmsintercom_kmsintercom_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*InterComTransportKeyNegotiationRequest); i {
+			switch v := v.(*SyncKeyIdsForBulkResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -802,7 +943,7 @@ func file_kmsintercom_kmsintercom_proto_init() {
 			}
 		}
 		file_kmsintercom_kmsintercom_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*InterComTransportKeyNegotiationResponse); i {
+			switch v := v.(*SyncQkdBulkResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -814,7 +955,7 @@ func file_kmsintercom_kmsintercom_proto_init() {
 			}
 		}
 		file_kmsintercom_kmsintercom_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KeyForwardingRequest); i {
+			switch v := v.(*InterComTransportKeyNegotiationRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -826,7 +967,7 @@ func file_kmsintercom_kmsintercom_proto_init() {
 			}
 		}
 		file_kmsintercom_kmsintercom_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KeyForwardingResponse); i {
+			switch v := v.(*InterComTransportKeyNegotiationResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -838,7 +979,7 @@ func file_kmsintercom_kmsintercom_proto_init() {
 			}
 		}
 		file_kmsintercom_kmsintercom_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*KeyIdNotificationRequest); i {
+			switch v := v.(*KeyForwardingRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -850,6 +991,30 @@ func file_kmsintercom_kmsintercom_proto_init() {
 			}
 		}
 		file_kmsintercom_kmsintercom_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KeyForwardingResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_kmsintercom_kmsintercom_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KeyIdNotificationRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_kmsintercom_kmsintercom_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*KeyIdNotificationResponse); i {
 			case 0:
 				return &v.state
@@ -868,7 +1033,7 @@ func file_kmsintercom_kmsintercom_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_kmsintercom_kmsintercom_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   10,
+			NumMessages:   12,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/api/gen/proto/go/kmsintercom/kmsintercom_grpc.pb.go b/api/gen/proto/go/kmsintercom/kmsintercom_grpc.pb.go
index d0868b93608661290c9c89e220fe8248794cbcbb..5ae671cc190549cd16de5c9bef5bbe9822623d50 100644
--- a/api/gen/proto/go/kmsintercom/kmsintercom_grpc.pb.go
+++ b/api/gen/proto/go/kmsintercom/kmsintercom_grpc.pb.go
@@ -21,6 +21,7 @@ const _ = grpc.SupportPackageIsVersion7
 const (
 	KmsTalker_InterComCapabilities_FullMethodName            = "/kmsintercom.KmsTalker/InterComCapabilities"
 	KmsTalker_SyncQkdBulk_FullMethodName                     = "/kmsintercom.KmsTalker/SyncQkdBulk"
+	KmsTalker_SyncKeyIdsForBulk_FullMethodName               = "/kmsintercom.KmsTalker/SyncKeyIdsForBulk"
 	KmsTalker_InterComTransportKeyNegotiation_FullMethodName = "/kmsintercom.KmsTalker/InterComTransportKeyNegotiation"
 	KmsTalker_KeyForwarding_FullMethodName                   = "/kmsintercom.KmsTalker/KeyForwarding"
 	KmsTalker_KeyIdNotification_FullMethodName               = "/kmsintercom.KmsTalker/KeyIdNotification"
@@ -32,6 +33,7 @@ const (
 type KmsTalkerClient interface {
 	InterComCapabilities(ctx context.Context, in *InterComCapabilitiesRequest, opts ...grpc.CallOption) (*InterComCapabilitiesReply, error)
 	SyncQkdBulk(ctx context.Context, in *SyncQkdBulkRequest, opts ...grpc.CallOption) (*SyncQkdBulkResponse, error)
+	SyncKeyIdsForBulk(ctx context.Context, in *SyncKeyIdsForBulkRequest, opts ...grpc.CallOption) (*SyncKeyIdsForBulkResponse, error)
 	InterComTransportKeyNegotiation(ctx context.Context, in *InterComTransportKeyNegotiationRequest, opts ...grpc.CallOption) (*InterComTransportKeyNegotiationResponse, error)
 	KeyForwarding(ctx context.Context, in *KeyForwardingRequest, opts ...grpc.CallOption) (*KeyForwardingResponse, error)
 	// KeyIDNotification is used for ETSI GS QKD 014
@@ -64,6 +66,15 @@ func (c *kmsTalkerClient) SyncQkdBulk(ctx context.Context, in *SyncQkdBulkReques
 	return out, nil
 }
 
+func (c *kmsTalkerClient) SyncKeyIdsForBulk(ctx context.Context, in *SyncKeyIdsForBulkRequest, opts ...grpc.CallOption) (*SyncKeyIdsForBulkResponse, error) {
+	out := new(SyncKeyIdsForBulkResponse)
+	err := c.cc.Invoke(ctx, KmsTalker_SyncKeyIdsForBulk_FullMethodName, in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *kmsTalkerClient) InterComTransportKeyNegotiation(ctx context.Context, in *InterComTransportKeyNegotiationRequest, opts ...grpc.CallOption) (*InterComTransportKeyNegotiationResponse, error) {
 	out := new(InterComTransportKeyNegotiationResponse)
 	err := c.cc.Invoke(ctx, KmsTalker_InterComTransportKeyNegotiation_FullMethodName, in, out, opts...)
@@ -97,6 +108,7 @@ func (c *kmsTalkerClient) KeyIdNotification(ctx context.Context, in *KeyIdNotifi
 type KmsTalkerServer interface {
 	InterComCapabilities(context.Context, *InterComCapabilitiesRequest) (*InterComCapabilitiesReply, error)
 	SyncQkdBulk(context.Context, *SyncQkdBulkRequest) (*SyncQkdBulkResponse, error)
+	SyncKeyIdsForBulk(context.Context, *SyncKeyIdsForBulkRequest) (*SyncKeyIdsForBulkResponse, error)
 	InterComTransportKeyNegotiation(context.Context, *InterComTransportKeyNegotiationRequest) (*InterComTransportKeyNegotiationResponse, error)
 	KeyForwarding(context.Context, *KeyForwardingRequest) (*KeyForwardingResponse, error)
 	// KeyIDNotification is used for ETSI GS QKD 014
@@ -114,6 +126,9 @@ func (UnimplementedKmsTalkerServer) InterComCapabilities(context.Context, *Inter
 func (UnimplementedKmsTalkerServer) SyncQkdBulk(context.Context, *SyncQkdBulkRequest) (*SyncQkdBulkResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method SyncQkdBulk not implemented")
 }
+func (UnimplementedKmsTalkerServer) SyncKeyIdsForBulk(context.Context, *SyncKeyIdsForBulkRequest) (*SyncKeyIdsForBulkResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SyncKeyIdsForBulk not implemented")
+}
 func (UnimplementedKmsTalkerServer) InterComTransportKeyNegotiation(context.Context, *InterComTransportKeyNegotiationRequest) (*InterComTransportKeyNegotiationResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method InterComTransportKeyNegotiation not implemented")
 }
@@ -172,6 +187,24 @@ func _KmsTalker_SyncQkdBulk_Handler(srv interface{}, ctx context.Context, dec fu
 	return interceptor(ctx, in, info, handler)
 }
 
+func _KmsTalker_SyncKeyIdsForBulk_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SyncKeyIdsForBulkRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(KmsTalkerServer).SyncKeyIdsForBulk(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: KmsTalker_SyncKeyIdsForBulk_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(KmsTalkerServer).SyncKeyIdsForBulk(ctx, req.(*SyncKeyIdsForBulkRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _KmsTalker_InterComTransportKeyNegotiation_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(InterComTransportKeyNegotiationRequest)
 	if err := dec(in); err != nil {
@@ -241,6 +274,10 @@ var KmsTalker_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "SyncQkdBulk",
 			Handler:    _KmsTalker_SyncQkdBulk_Handler,
 		},
+		{
+			MethodName: "SyncKeyIdsForBulk",
+			Handler:    _KmsTalker_SyncKeyIdsForBulk_Handler,
+		},
 		{
 			MethodName: "InterComTransportKeyNegotiation",
 			Handler:    _KmsTalker_InterComTransportKeyNegotiation_Handler,
diff --git a/api/kmsintercom/kmsintercom/kmsintercom.proto b/api/kmsintercom/kmsintercom/kmsintercom.proto
index 2b61a3211ebc604c86009c96df98d25f01955f30..845742ad9d188953b8b839fe11b70038e4dcbbf8 100644
--- a/api/kmsintercom/kmsintercom/kmsintercom.proto
+++ b/api/kmsintercom/kmsintercom/kmsintercom.proto
@@ -6,6 +6,7 @@ package kmsintercom;
 service KmsTalker {
 	rpc InterComCapabilities (InterComCapabilitiesRequest) returns (InterComCapabilitiesReply) {}
     rpc SyncQkdBulk(SyncQkdBulkRequest) returns (SyncQkdBulkResponse) {}
+    rpc SyncKeyIdsForBulk(SyncKeyIdsForBulkRequest) returns (SyncKeyIdsForBulkResponse) {}
 	rpc InterComTransportKeyNegotiation(InterComTransportKeyNegotiationRequest) returns (InterComTransportKeyNegotiationResponse) {}
     rpc KeyForwarding(KeyForwardingRequest) returns (KeyForwardingResponse) {}
     // KeyIDNotification is used for ETSI GS QKD 014
@@ -32,6 +33,17 @@ message SyncQkdBulkRequest {
 	//string bulkHash = 4;
 }
 
+message SyncKeyIdsForBulkRequest {
+	int64 timestamp = 1;
+    string interComAddr = 2;
+	int64 bulkId = 3;
+	repeated string keyId = 4;
+}
+
+message SyncKeyIdsForBulkResponse {
+	int64 timestamp = 1;
+}
+
 message SyncQkdBulkResponse {
 	int64 timestamp = 1;
     int64 bulkId = 2;
@@ -41,7 +53,7 @@ message SyncQkdBulkResponse {
 message InterComTransportKeyNegotiationRequest {
 	int64 timestamp = 1;
     string pathID = 2;
-    uint64 keyToUse = 3;
+    string keyToUse = 3;
 }
 
 message InterComTransportKeyNegotiationResponse {
diff --git a/kms/kms-keystore.go b/kms/kms-keystore.go
index 93a29b740a1f4da5ff0077ab8365e54a41f5b7bc..466d1ea62c351cb86a6402c94bf99214a41ead2a 100644
--- a/kms/kms-keystore.go
+++ b/kms/kms-keystore.go
@@ -4,9 +4,8 @@ import (
 	"fmt"
 	"sync"
 
+	"github.com/google/uuid"
 	log "github.com/sirupsen/logrus"
-
-	"code.fbi.h-da.de/danet/proto-kms/quantumlayer"
 )
 
 type Status int
@@ -18,35 +17,28 @@ const (
 	USED
 )
 
-type kmsKS interface {
-	KeyChopper(bulkKey *quantumlayer.QuantumLayerBulkKey) (err error)
-	addKey(int64, [8]byte)
-}
-
 // holds a single ready to bit key, length can be configured
 type kmsKSElement struct {
-	keyID  uint64
+	keyID  uuid.UUID
 	key    []byte // a key
 	status Status
 }
 
 type kmsKeyStore struct {
 	keyStoreMutex sync.Mutex
-	keyStore      map[uint64]*kmsKSElement
+	keyStore      map[uuid.UUID]*kmsKSElement
 	keySingleSize uint // the size of a single key, given as unit of bits
-	indexCounter  uint64
 }
 
 func NewKmsKeyStore(desiredkeySingleSizeLength uint) *kmsKeyStore {
 	return &kmsKeyStore{
 		// NOTE: could be useful to use something like a ordered map here
-		keyStore:      make(map[uint64]*kmsKSElement),
+		keyStore:      make(map[uuid.UUID]*kmsKSElement),
 		keySingleSize: desiredkeySingleSizeLength,
-		indexCounter:  0,
 	}
 }
 
-func (ks *kmsKeyStore) addKey(keyId uint64, keyToadd []byte) {
+func (ks *kmsKeyStore) addKey(keyId uuid.UUID, keyToadd []byte) {
 	ks.keyStoreMutex.Lock()
 	defer ks.keyStoreMutex.Unlock()
 
@@ -69,41 +61,34 @@ func (ks *kmsKeyStore) GetKey() (*kmsKSElement, error) {
 	ks.keyStoreMutex.Lock()
 	defer ks.keyStoreMutex.Unlock()
 
-	key, ok := ks.keyStore[ks.indexCounter]
-	if !ok {
-		return nil, fmt.Errorf("Could not find a key for id: %d", ks.indexCounter)
+	// TODO: if we want random here, then we have to take a different approach
+	for _, key := range ks.keyStore {
+		if key.status == AVAILABLE {
+			// change status of key to reserved
+			key.status = RESERVED
+			return key, nil
+		}
 	}
-	if key.status == AVAILABLE {
-		// change status of key to reserved
-		key.status = RESERVED
-		// increase index counter
-		ks.indexCounter = ks.indexCounter + 1
-
-		return key, nil
-	}
-	return nil, fmt.Errorf("Key with index: %d is already reserved.", ks.indexCounter)
+	return nil, fmt.Errorf("could not find a key to use")
 }
 
-func (ks *kmsKeyStore) GetKeyWithID(id uint64) (*kmsKSElement, error) {
+func (ks *kmsKeyStore) GetKeyWithID(id uuid.UUID) (*kmsKSElement, error) {
 	ks.keyStoreMutex.Lock()
 	defer ks.keyStoreMutex.Unlock()
 
 	key, ok := ks.keyStore[id]
 	if !ok {
-		return nil, fmt.Errorf("Could not find a key for id: %d", ks.indexCounter)
+		return nil, fmt.Errorf("Could not find a key for id: %v", id)
 	}
 	if key.status == AVAILABLE {
 		// change status of key to reserved
 		key.status = RESERVED
-		// increase index counter
-		ks.indexCounter = ks.indexCounter + 1
-
 		return key, nil
 	}
-	return nil, fmt.Errorf("Key with index: %d is already reserved.", ks.indexCounter)
+	return nil, fmt.Errorf("Key with index: %v is already reserved.", id)
 }
 
-func (ks *kmsKeyStore) DeleteKey(keyId uint64) {
+func (ks *kmsKeyStore) DeleteKey(keyId uuid.UUID) {
 	ks.keyStoreMutex.Lock()
 	delete(ks.keyStore, keyId)
 	ks.keyStoreMutex.Unlock()
diff --git a/kms/kmsetsi.go b/kms/kmsetsi.go
index aa5013d368b396e3f554608e632c7c1b1b6b80d5..8e907c8f0828e7e951bec9c05ecf5d83155c6ac0 100644
--- a/kms/kmsetsi.go
+++ b/kms/kmsetsi.go
@@ -25,7 +25,6 @@ var (
 type etsiServer struct {
 	pb.UnimplementedKmsETSIServer
 	handlingEkms *EKMS
-	visitedKeys  map[*kmsKSElement]bool
 }
 
 func (es *etsiServer) ETSICapabilities(ctx context.Context, in *pb.ETSICapabilitiesRequest) (capReply *pb.ETSICapabilitiesReply, err error) {
@@ -181,7 +180,6 @@ func StartETSI(listenAddr string, callingKMS *EKMS) {
 	s := grpc.NewServer()
 	pb.RegisterKmsETSIServer(s, &etsiServer{
 		handlingEkms: callingKMS,
-		visitedKeys:  make(map[*kmsKSElement]bool),
 	})
 	log.Infof("server listening at %v", lis.Addr())
 	if err := s.Serve(lis); err != nil {
diff --git a/kms/kmsintercom.go b/kms/kmsintercom.go
index 7076f2782ac1a43349906703d5dde62ced521824..c7ec9ebbd2421208f360f400cf00a4eea96d2a11 100644
--- a/kms/kmsintercom.go
+++ b/kms/kmsintercom.go
@@ -104,19 +104,7 @@ func (s *kmsTalkerServer) SyncQkdBulk(ctx context.Context, in *pb.SyncQkdBulkReq
 	}
 
 	for _, bulkId := range in.BulkId {
-		rawBulkKeyIds := keysOfMap[int64](eqm.rawBulkKeys)
-		log.Info("PEER BULK KEYS: ", rawBulkKeyIds)
-		if bulk, ok := eqm.rawBulkKeys[bulkId]; ok {
-			eqm.keyStore = NewKmsKeyStore(256)
-			if err := eqm.KeyChopper(bulk); err != nil {
-				//TODO: proper error message
-				return nil, status.Errorf(codes.Internal, "chopping failed")
-			}
-
-			eqm.rawBulkKeysMutex.Lock()
-			delete(eqm.rawBulkKeys, bulkId)
-			eqm.rawBulkKeysMutex.Unlock()
-
+		if _, ok := eqm.rawBulkKeys[bulkId]; ok {
 			return &pb.SyncQkdBulkResponse{
 				Timestamp: time.Now().Unix(),
 				BulkId:    bulkId,
@@ -124,6 +112,41 @@ func (s *kmsTalkerServer) SyncQkdBulk(ctx context.Context, in *pb.SyncQkdBulkReq
 		}
 	}
 
+	return nil, status.Errorf(codes.Unimplemented, "method SyncQkdBulk not implemented")
+}
+
+func (s *kmsTalkerServer) SyncKeyIdsForBulk(ctx context.Context, in *pb.SyncKeyIdsForBulkRequest) (*pb.SyncKeyIdsForBulkResponse, error) {
+	peer, ok := s.eKMS.KmsPeers[in.GetInterComAddr()]
+	if !ok {
+		return nil, status.Errorf(codes.Internal, "For address: %s, no peer exists", in.GetInterComAddr())
+	}
+
+	eqm, ok := peer.servingQuantumModul.(*EmulatedQuantumModule)
+	if !ok {
+		return nil, status.Errorf(codes.Internal, "expected a emulated quantum module")
+	}
+
+	eqm.rawBulkKeysMutex.Lock()
+	bulk, ok := eqm.rawBulkKeys[in.GetBulkId()]
+	if !ok {
+		return nil, status.Errorf(codes.Internal, "bulk key with id: %d not found", in.GetBulkId())
+	}
+	eqm.rawBulkKeysMutex.Unlock()
+
+	eqm.keyStore = NewKmsKeyStore(256)
+	_, keyData, err := eqm.KeyChopper(bulk, in.GetKeyId())
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "%v", err)
+	}
+
+	for keyId, key := range keyData {
+		eqm.keyStore.addKey(keyId, key)
+	}
+
+	eqm.rawBulkKeysMutex.Lock()
+	delete(eqm.rawBulkKeys, in.GetBulkId())
+	eqm.rawBulkKeysMutex.Unlock()
+
 	// update the peer status to up
 	peer.peerStatus = KmsPeerUp
 	// Send notification about change
@@ -131,17 +154,22 @@ func (s *kmsTalkerServer) SyncQkdBulk(ctx context.Context, in *pb.SyncQkdBulkReq
 		peer.externalNotifierKMSPeer <- peer.tcpSocketStr
 	}
 
-	return nil, status.Errorf(codes.Unimplemented, "method SyncQkdBulk not implemented")
+	return &pb.SyncKeyIdsForBulkResponse{
+		Timestamp: time.Now().Unix(),
+	}, nil
 }
 
 func (s *kmsTalkerServer) InterComTransportKeyNegotiation(ctx context.Context, in *pb.InterComTransportKeyNegotiationRequest) (capReply *pb.InterComTransportKeyNegotiationResponse, err error) {
 	// NOTE: For the current prototype it is assumed that a negotiation request
 	// is always valid. In the future an incoming negotiation request should
 	// also check for a suitable forwarding assignment from the controller.
-	keyID := in.KeyToUse
-	pathId, err := uuid.Parse(in.PathID)
+	keyID, err := uuid.Parse(in.GetKeyToUse())
 	if err != nil {
-		return nil, status.Errorf(codes.InvalidArgument, "")
+		return nil, status.Errorf(codes.InvalidArgument, "key with id: %s can not be parsed to uuid", in.GetKeyToUse())
+	}
+	pathId, err := uuid.Parse(in.GetPathID())
+	if err != nil {
+		return nil, status.Errorf(codes.InvalidArgument, "path id: %s can not be parsed to uuid", in.GetPathID())
 	}
 
 	route, ok := s.eKMS.routingTable[pathId]
@@ -165,6 +193,8 @@ func (s *kmsTalkerServer) InterComTransportKeyNegotiation(ctx context.Context, i
 	// TODO: mutex
 	s.keyNegotiationMap[pathId] = key
 
+	quantumModuleKeyStore.DeleteKey(keyID)
+
 	return &pb.InterComTransportKeyNegotiationResponse{Timestamp: time.Now().Unix()}, nil
 }
 
@@ -200,7 +230,7 @@ func (s *kmsTalkerServer) KeyForwarding(ctx context.Context, in *pb.KeyForwardin
 		log.Infof("%s forwards payload to : %s", s.eKMS.kmsName, route.Next.tcpSocketStr)
 		go route.Next.SendPayload(decryptedPayload, pathId)
 	} else {
-		log.Infof("%s received the final payload: ", s.eKMS.kmsName, string(decryptedPayload))
+		log.Infof("%s received the final payload: %s", s.eKMS.kmsName, string(decryptedPayload))
 	}
 
 	//// NOTE: For demo purpose only
diff --git a/kms/kmspeers.go b/kms/kmspeers.go
index 30f3e2ca51d3445b17016b6553c432fdc026e68f..05bda9fb812301751c82a632ab6c082ef248181d 100644
--- a/kms/kmspeers.go
+++ b/kms/kmspeers.go
@@ -96,7 +96,7 @@ func (ph *kmsPeer) TransportKeyNegotiation() error {
 func (ph *kmsPeer) SendPayload(payload []byte, pathId uuid.UUID) error {
 	// NOTE: It should be assumed that there are keys available if we try to
 	// send.
-	if len(ph.servingQuantumModul.KeyStore().keyStore) <= int(ph.servingQuantumModul.KeyStore().indexCounter) {
+	if len(ph.servingQuantumModul.KeyStore().keyStore) == 0 {
 		log.Debug("Syncing bulk keys before sending the payload")
 		err := ph.SyncBulkKeys()
 		if err != nil {
@@ -118,12 +118,13 @@ func (ph *kmsPeer) SendPayload(payload []byte, pathId uuid.UUID) error {
 	_, err = ph.peerClient.InterComTransportKeyNegotiation(ctx, &pbIC.InterComTransportKeyNegotiationRequest{
 		Timestamp: time.Now().Unix(),
 		PathID:    pathId.String(),
-		KeyToUse:  key.keyID,
+		KeyToUse:  key.keyID.String(),
 	})
 	if err != nil {
 		return err
 	}
-	// TODO: delete key?
+
+	ph.servingQuantumModul.KeyStore().DeleteKey(key.keyID)
 
 	// TODO: would be better to update the index counter here (to keep it
 	// synchronized).
diff --git a/kms/module.go b/kms/module.go
index dd0a5a23790cbf19563678676703943b8316f6ca..14fff0f02f7fb548091cfb2b652dc81a464d9e37 100644
--- a/kms/module.go
+++ b/kms/module.go
@@ -25,8 +25,8 @@ type QuantumModule interface {
 	Initialize() error
 	// NOTE: Sync will be removed as soon as the emulated quantum module has been
 	// changed to push a constant byte stream.
-	Sync() error
 	KeyStore() *kmsKeyStore
+	Sync() error
 	Peer() *kmsPeer
 	SetPeer(*kmsPeer)
 	Address() net.Addr
@@ -71,10 +71,6 @@ func (eqe *EmulatedQuantumModule) Address() net.Addr {
 	return eqe.QuantumElementLink.GetLocalQLPort()
 }
 
-func (eqe *EmulatedQuantumModule) KeyStore() *kmsKeyStore {
-	return eqe.keyStore
-}
-
 func (eqe *EmulatedQuantumModule) Sync() error {
 	rawBulkKeyIds := keysOfMap[int64](eqe.rawBulkKeys)
 	logrus.Info("Found the following bulk key ids for usage: ", rawBulkKeyIds)
@@ -100,10 +96,25 @@ func (eqe *EmulatedQuantumModule) Sync() error {
 	// for now it is hardcoded.
 	eqe.keyStore = NewKmsKeyStore(256)
 
-	if err := eqe.KeyChopper(bulkKey); err != nil {
+	keyIds, keyData, err := eqe.KeyChopper(bulkKey, []string{})
+	if err != nil {
+		return err
+	}
+
+	_, err = eqe.peer.peerClient.SyncKeyIdsForBulk(ctx, &pbIC.SyncKeyIdsForBulkRequest{
+		Timestamp:    time.Now().Unix(),
+		InterComAddr: eqe.peer.interComAddr,
+		BulkId:       initialPeerSetupResponse.BulkId,
+		KeyId:        keyIds,
+	})
+	if err != nil {
 		return err
 	}
 
+	for keyId, key := range keyData {
+		eqe.keyStore.addKey(keyId, key)
+	}
+
 	eqe.rawBulkKeysMutex.Lock()
 	delete(eqe.rawBulkKeys, initialPeerSetupResponse.BulkId)
 	eqe.rawBulkKeysMutex.Unlock()
@@ -118,6 +129,10 @@ func (eqe *EmulatedQuantumModule) Sync() error {
 	return nil
 }
 
+func (eqe *EmulatedQuantumModule) KeyStore() *kmsKeyStore {
+	return eqe.keyStore
+}
+
 func (eqe *EmulatedQuantumModule) Peer() *kmsPeer {
 	return eqe.peer
 }
@@ -147,33 +162,44 @@ func (eqe *EmulatedQuantumModule) keyHandler() {
 
 // Takes a bulk of keys and chops them in chopFactor keys each
 // Any remainder is discarded
-func (eqe *EmulatedQuantumModule) KeyChopper(bulkKey *quantumlayer.QuantumLayerBulkKey) error {
+// If keyIds is empty, uuids are generated
+func (eqe *EmulatedQuantumModule) KeyChopper(bulkKey *quantumlayer.QuantumLayerBulkKey, keyIds []string) ([]string, map[uuid.UUID][]byte, error) {
 	if eqe.keyStore.keySingleSize == 0 {
-		return errors.New("KeyChopper: no  keySingleSize set")
+		return nil, nil, errors.New("KeyChopper: no  keySingleSize set")
 	}
 	// TODO check if multiple of 8 (1 Byte)
 
 	if bulkKey.BulkKeyLength != len(*bulkKey.BulkKey) {
-		return errors.New("bulkKey length mismatch")
+		return nil, nil, errors.New("bulkKey length mismatch")
 	}
 
-	// reset indexCounter
-	eqe.keyStore.indexCounter = 0
-
-	var keyId uint64
-	keyId = 0
+	initialKeyIdsLen := len(keyIds)
 
 	// Let's chop!
+	keyData := make(map[uuid.UUID][]byte)
 	chopFactor := eqe.keyStore.keySingleSize >> 3
 	key := *bulkKey.BulkKey
+	counter := 0
 	for len(key) > int(chopFactor) {
+		var keyId uuid.UUID
+		var err error
+		if initialKeyIdsLen == 0 {
+			keyId = uuid.New()
+			keyIds = append(keyIds, keyId.String())
+		} else {
+			keyId, err = uuid.Parse(keyIds[counter])
+			if err != nil {
+				return nil, nil, fmt.Errorf("The provided ID: %s can not be parsed as UUID.", keyIds[counter])
+			}
+			counter++
+		}
 		tmpkey := key[:chopFactor]
-		eqe.keyStore.addKey(keyId, tmpkey)
-		keyId++
+		keyData[keyId] = tmpkey
+
 		// shorten the key storage
 		key = key[chopFactor:]
 	}
-	return nil
+	return keyIds, keyData, nil
 }
 
 type ETSI014HTTPQuantumModule struct {
diff --git a/kms/util.go b/kms/util.go
index c17bf87f27edd757c57e11ad9cebabe6d0f02a44..3857dfe8c2f002bdb97bf2e50e792908fa670c28 100644
--- a/kms/util.go
+++ b/kms/util.go
@@ -5,9 +5,9 @@ import (
 	"encoding/base64"
 	"fmt"
 	"net/http"
-	"strconv"
 
 	etsi14 "code.fbi.h-da.de/danet/ekms/api/go/rest/etsi/client"
+	"github.com/google/uuid"
 )
 
 func randomItemFromMap[T comparable, M any](m map[T]M) (M, error) {
@@ -48,18 +48,12 @@ func addETSIKeysToKeystore(keyStore *kmsKeyStore, keyContainer []etsi14.KeyConta
 		if err != nil {
 			return err
 		}
-
-		// key id to uint
-		keyId := keyItem.GetKeyID()
-		keyIdUint, err := strconv.ParseUint(keyId, 10, 64)
+		keyId, err := uuid.Parse(keyItem.GetKeyID())
 		if err != nil {
 			return err
 		}
-
 		// add to keystore
-		keyStore.keyStoreMutex.Lock()
-		keyStore.addKey(keyIdUint, key)
-		keyStore.keyStoreMutex.Unlock()
+		keyStore.addKey(keyId, key)
 	}
 	return nil
 }