diff --git a/broker/src/main/java/io/moquette/imhandler/RouteHandler.java b/broker/src/main/java/io/moquette/imhandler/RouteHandler.java
index 85234cbc..1e6ee26b 100644
--- a/broker/src/main/java/io/moquette/imhandler/RouteHandler.java
+++ b/broker/src/main/java/io/moquette/imhandler/RouteHandler.java
@@ -40,6 +40,11 @@ public class RouteHandler extends IMHandler<WFCMessage.RouteRequest> {
             return ErrorCode.ERROR_CODE_SECRECT_KEY_MISMATCH;
         }
 
+        if(request.getPlatform() != session.getPlatform() && m_messagesStore.existSignatures()) {
+            LOG.error("Session <{}, {}> platform is {} mismatch the request {}", session.getUsername(), session.getClientID(), session.getPlatform(), request.getPlatform());
+            return ErrorCode.ERROR_CODE_SECRECT_KEY_MISMATCH;
+        }
+
         String serverIp = mServer.getServerIp();
         String longPort = mServer.getLongPort();
         String shortPort = mServer.getShortPort();
diff --git a/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java b/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
index 589bbf23..1922c4f7 100755
--- a/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
+++ b/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
@@ -4356,6 +4356,10 @@ public class MemoryMessagesStore implements IMessagesStore {
 
     @Override
     public boolean checkSignature(String signature) {
+        if(mClientSignatureSet.isEmpty()) {
+            return true;
+        }
+
         if(StringUtil.isNullOrEmptyAfterTrim(signature)) {
             if(mRejectEmptySignature) {
                 LOG.info("Failed check signature, no signature");
@@ -4373,6 +4377,11 @@ public class MemoryMessagesStore implements IMessagesStore {
         }
     }
 
+    @Override
+    public boolean existSignatures() {
+        return !mClientSignatureSet.isEmpty();
+    }
+
     @Override
     public void storeRetained(Topic topic, StoredMessage storedMessage) {
         LOG.debug("Store retained message for topic={}, CId={}", topic, storedMessage.getClientID());
diff --git a/broker/src/main/java/io/moquette/spi/IMessagesStore.java b/broker/src/main/java/io/moquette/spi/IMessagesStore.java
index f94268dd..7b3b6f6f 100755
--- a/broker/src/main/java/io/moquette/spi/IMessagesStore.java
+++ b/broker/src/main/java/io/moquette/spi/IMessagesStore.java
@@ -251,6 +251,7 @@ public interface IMessagesStore {
     String getShortUUID();
 
     boolean checkSignature(String signature);
+    boolean existSignatures();
     /**
      * Used to initialize all persistent store structures
      */