Hi Mr. Mikko, I would like to ask you about the blockCipher , Authentication keys . I would like to know how the GXDirector Translate the digits of blockCipherKey and AuthenticationKey (example 2222222222222222 ASCII) when communicate with the meter with secured connection. What will the code be after the modification/translation that GXDirector will do?? What format will it have the 2222222222222222 key?
. The electric meter store in memory (when I save new security codes) with the same format as GXdirector produce/translate the key inside the eeprom of the meter (the CipherKeys) or the meter use different format to save the security codes??
I have read the eeprom and I have found only the system title inside the eeprom , is stored in HEX format but only the system title. The other codes I can’t locate it.
If you can help me to locate the chipper codes inside the eeprom I will send you donation, I don’t want for free.
Regards Lambros
Hi Lambros, The…
Hi Lambros,
The authentication and block cipher keys are saved to the Security setup object
The keys are 16 bytes long octet-strings, so ASCII string 2222222222222222 is saved as 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32 32.
https://gurux.fi/Gurux.DLMS.Objects.GXDLMSSecuritySetup
BR,
Mikko