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Ted Krovetz <tdk@acm.org> Mon, 14 November 2005 04:40 UTC

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From: Ted Krovetz <tdk@acm.org>
Date: Sun, 13 Nov 2005 20:40:48 -0800
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Hello,

A revised UMAC Internet-Draft is now available.

   http://www.ietf.org/internet-drafts/draft-krovetz-umac-07.txt

The primary change is in key-derivation, which now uses a simple  
counter mode for which it is easy to verify that there are no  
redundant AES inputs. Although the old version was secure (and  
provably so), questions about it included references to "Occam's  
Razor" and referred to it as "wacky". We took that as a cue that  
people didn't care for its design, and so made this revision.

I would like to point out that the UMAC algorithm has not changed,  
just how internal key material is generated.

Two other changes in this draft are included: revised test-vectors to  
reflect the algorithmic change and some small text edits to improve  
clarity.

Thank you,
Ted Krovetz

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