Hacker News Reader

What smart meter brands (and in which models) actually support this protocol? I haven't seen it running anywhere. Is this more common outside the US?

View on HN

It's mainly used in Europe. The US has a very similar, but older protocol called ANSI C12. The C12.22 spec includes authenticated encryption, but I'm not familiar with the details.

C12.22 is DES-CBC with CRC-16 used as integrity checks. :)

Ouch, thats bad :) C12.22 is pretty old, AES didn't even exist yet. It seems that it got an update recently (2011) with the smart grid and smart metering use case in mind. The are now using an EAX called EAX prime [1] put it seems to have it's own issues [2].

[1] http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/propose... [2] http://eprint.iacr.org/2012/018.pdf

Reply on news.ycombinator.com