On Fri, Aug 29, 2008 at 01:42:45AM -0700, Andrew Lentvorski wrote:
I'm thinking about how you reuse the fob. You only want one of these things on your keychain, after all.
Having the key be public would help with reuse, since the authentication information doesn't have to be secret.
The 8051 I was looking at (TI CC111x series) actually has an AES engine in it. But that doesn't help for public key algorithms.
Too bad it doesn't have an RSA engine in it. ANSI X9.9 is a DES-based message authentication which could easily be adapted to AES, so that would work nicely for a key with a shared secret. David -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
