Get meter Serial No: （Systemtitle: 12345678 , same Au Key & En Key: 1234561234561234）
Settings: Mode-MR, Priority-High, LLs, Security level-Encryption
Send：
W: 7E A0 20 03 41 32 AB 08 E6 E6 00 C8 12 20 00 00 0B 92 D1 9D C4 4F DA 62 30 5F 51 A4 3F 91 91 30 4A 7E
Decrypted : C001 C1 0001 0000600100FF 0200，correct!
Recived:
R: 7E A0 22 41 03 52 C3 94 E6 E7 00 CC 14 20 00 00 0C 03 21 3D D4 06 2A 7D C6 F6 D5 22 EC 1E 4F 83 35 7A A2 7E
Decrypted by EnKey(ASCII 1234561234561234) ,not correct： A721FF9A8CE3CEE837B88041B28F51
Does decrypting the returned data require different key?
The returned data should be: CC 14 20 00 00 0C 03 42 1D EA 9C AF 97 44 4D B5 A8 58 6E C4 38 52? than, decrypt the data like send data , get the correct result.
The meter sn is：SW241946 -->4C 53 57 32 34 31 39 34 36
How to get it? THNKS!!!
Hi, In GMAC the client and…
Hi,
In GMAC the client and the server MUST use the same authentication and block cipher key and the key is the same for encrypting and decrypting.
BR,
Mikko