avl_aes_key_handling.md

@@ -20,5 +20,18 @@ sequenceDiagram
     Dev_TCP->D2S_TCP: excahnge data
     Dev_TCP->D2S_TCP: excahnge data
     %%Note over Dev,Dev_TCP,D2S_TCP,D2S_DB,D2S_API: key change via REST API
+    Dev_TCP->D2S_TCP : excahnge data
+    Dev_TCP->D2S_TCP : excahnge data
+    D2S_API->>D2S_TCP: keychange request with new key
+    D2S_TCP->Dev_TCP : sent new Key
+    Dev_TCP->>Dev : store new key in TPM key store
+    Dev_TCP->>D2S_TCP : sent ACK / OK:ERROR
+    Dev_TCP->Dev_TCP : use new Key
+    D2S_TCP->D2S_TCP : receive ACK / OK
+    D2S_TCP->>D2S_DB : store new Key
+    D2S_TCP->>D2S_API : respond API request
+    D2S_TCP->D2S_TCP : use new key
+    Dev_TCP->>D2S_TCP : excahnge data with new Key
+    Dev_TCP->>D2S_TCP : excahnge data with new Key
 		
 ```
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