NIST received several thoughtful public comments on the draft NIST Special Publication 800-38B specifying RMAC as a recommended MAC algorithm for use with either AES and Triple DES. In response to the comments, NIST has posted a consultation paper at, with a link to the paper under the heading "NIST Recommendation for Modes." The paper summarizes the technical issues underlying the selection of a block cipher based MAC and proposes to refocus the RMAC specification to its underlying EMAC construction.

Further comments on the draft SP 800-38B and the consultation paper may be submitted to [EMAIL PROTECTED] until May 5, 2003.


Morris Dworkin
Computer Security Division

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