Re: Authentication of a messages using a counter and a MAC

"Jakob" <jakobsson.ulf@xxxxxxxxx> wrote in message
news:1169645124.922789.249050@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi!
Where I can find information about it this approach?
We have a messages, 128 bit key, counter, AES, and OMAC and want to
authenticate a stream of messages using

MAC (key)[counter|| message]
how to do it?

Include the MAC in the transmitted message, the other side computes MAC
(key)[counter||message] compare the two values, if they match it's
authenticated.
Joe


.

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