avl_aes_key_handling.md

 # AVL AES Key Handling
 
 ```mermaid
-
 sequenceDiagram
 	 
 	autonumber
 	... create D2Sphere TCP conncetion ...
 	Dev -> Dev_TCP : create TCP session
 	Dev_TCP -> D2S_TCP : sent Login plain (contains uuid/IMEI and used enryption mode)
-	Dev_TCP <- Dev : load AES key from TPM key store to AES module
-	Dev_TCP <- Dev_TCP : start using enryption
-	Dev_TCP <- Dev_TCP : parse Login, mode, uuid
-	Dev_TCP <- D2S_DB : load AES key for uuid
-	D2S_TCP <- D2S_TCP : start using enryption
-	Dev_TCP <-> D2S_TCP : excahnge data
-	Dev_TCP <-> D2S_TCP : excahnge data
 	
-	... key change via REST API ...
-	Dev_TCP <-> D2S_TCP : excahnge data
-	Dev_TCP <-> D2S_TCP : excahnge data
-	D2S_TCP <- D2S_API: keychange request with new key
-	Dev_TCP <- D2S_TCP : sent new Key
-	Dev <- Dev_TCP : store new key in TPM key store
-	D2S_TCP <- Dev_TCP : sent ACK / OK:ERROR
-	Dev_TCP <- Dev_TCP : use new Key
-	D2S_TCP <- D2S_TCP : receive ACK / OK
-	D2S_DB <- D2S_TCP : 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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