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Every device has it's own unique keys - one for transmitting data and another for receiving commands. They are burned with firmware in production. If you are in
by SergeAx 9y ago
Every device has it's own unique keys - one for transmitting data and another for receiving commands. They are burned with firmware in production. If you are interested in bruteforcing - I can send you two weeks worth of my home water meters' data packets to play with :) See, the CRC is calculated for encrypted data, so there is no way to know if the guessed key is correct.
- glogla 9y agoNo MACs?
- SergeAx 9y agoThere are unique device Ids, they kinda like MACs.
- darklajid 9y agoOld thread, but GP probably talked about a different thing. Not MAC as in Ethernet.. https://en.m.wikipedia.org/wiki/Message_authentication_code https://en.m.wikipedia.org/wiki/Message_authentication_code
- SergeAx 9y agoOh, those MACs) No, we've spend that bandwidth for iterators to mitigate replay attack. But the idea of one-time MAC is interesting, thank you.