Re: [Hash] Charter discussion, round 1

Paul Hoffman <paul.hoffman@vpnc.org> Thu, 16 June 2005 02:52 UTC

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Date: Wed, 15 Jun 2005 19:41:58 -0700
To: hash@ietf.org
From: Paul Hoffman <paul.hoffman@vpnc.org>
Subject: Re: [Hash] Charter discussion, round 1
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At 7:24 PM -0700 6/15/05, EKR wrote:
>So, defining truncated hashes really only makes sense for ECDSA/DSA
>and other algorithms with fixed input sizes....

At 10:25 PM +0000 6/15/05, D. J. Bernstein wrote:
>Randomized hashing requires even more protocol changes than moving to a
>longer hash, not to mention implementation changes. So it doesn't make
>sense to consider randomized hashing without considering longer hashes.

We have two use cases here, both of which are probably important. The 
first is algorithms with fixed input sizes; the second is protocols 
with fixed hash sizes (or variable hash sizes that max out at 128 or 
160). Both seem worth investigating and documenting.

--Paul Hoffman, Director
--VPN Consortium

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