One-key MAC

From Wikipedia, the free encyclopedia
Jump to: navigation, search

OMAC (One-key MAC) is a message authentication code constructed from a block cipher much like the CBC-MAC algorithm.

Officially there are two OMAC algorithms (OMAC1 and OMAC2) which are both essentially the same except for a small tweak. OMAC1 is equivalent to CMAC which became an NIST recommendation in May 2005.

It is free for all uses (no patents).

External links[edit]