diff --git a/services/backup/docker-server/contents/server/src/Reactors/server/CreateNewBackupReactor.h b/services/backup/docker-server/contents/server/src/Reactors/server/CreateNewBackupReactor.h
--- a/services/backup/docker-server/contents/server/src/Reactors/server/CreateNewBackupReactor.h
+++ b/services/backup/docker-server/contents/server/src/Reactors/server/CreateNewBackupReactor.h
@@ -20,12 +20,14 @@
                                    backup::CreateNewBackupRequest,
                                    backup::CreateNewBackupResponse> {
   enum class State {
-    KEY_ENTROPY = 1,
-    DATA_HASH = 2,
-    DATA_CHUNKS = 3,
+    USER_ID = 1,
+    KEY_ENTROPY = 2,
+    DATA_HASH = 3,
+    DATA_CHUNKS = 4,
   };
 
-  State state = State::KEY_ENTROPY;
+  State state = State::USER_ID;
+  std::string userID;
   std::string keyEntropy;
   std::string dataHash;
   std::string backupID;
@@ -56,6 +58,14 @@
   // as there may be multiple threads from the pool taking over here
   const std::lock_guard<std::mutex> lock(this->reactorStateMutex);
   switch (this->state) {
+    case State::USER_ID: {
+      if (!request.has_userid()) {
+        throw std::runtime_error("user id expected but not received");
+      }
+      this->userID = request.userid();
+      this->state = State::KEY_ENTROPY;
+      return nullptr;
+    }
     case State::KEY_ENTROPY: {
       if (!request.has_keyentropy()) {
         throw std::runtime_error(
diff --git a/services/backup/docker-server/contents/server/src/Reactors/server/SendLogReactor.h b/services/backup/docker-server/contents/server/src/Reactors/server/SendLogReactor.h
--- a/services/backup/docker-server/contents/server/src/Reactors/server/SendLogReactor.h
+++ b/services/backup/docker-server/contents/server/src/Reactors/server/SendLogReactor.h
@@ -16,6 +16,13 @@
 class SendLogReactor : public ServerReadReactorBase<
                            backup::SendLogRequest,
                            google::protobuf::Empty> {
+  enum class State {
+    USER_ID = 1,
+    LOG_CHUNK = 2,
+  };
+
+  State state = State::USER_ID;
+  std::string userID;
 
 public:
   using ServerReadReactorBase<backup::SendLogRequest, google::protobuf::Empty>::
@@ -28,10 +35,17 @@
 
 std::unique_ptr<grpc::Status>
 SendLogReactor::readRequest(backup::SendLogRequest request) {
-  // TODO implement
-  std::cout << "handle request log chunk " << request.logdata().size()
-            << std::endl;
-  return nullptr;
+  switch (this->state) {
+    case State::USER_ID: {
+      if (!request.has_userid()) {
+        throw std::runtime_error("user id expected but not received");
+      }
+      this->userID = request.userid();
+      this->state = State::LOG_CHUNK;
+      return nullptr;
+    };
+  }
+  throw std::runtime_error("send log - invalid state");
 }
 
 void SendLogReactor::doneCallback() {