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Subject: Re: [reiserfs-dev] Re: Ext2 directory index: ALS paper and
	benchmarks
From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Daniel Phillips <phillips@bonn-fries.net>
Cc: Ragnar =?ISO-8859-1?Q?Kj=F8rstad?= <reiserfs@ragnark.vestdata.no>,
        Hans Reiser <reiser@namesys.com>,
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On Fri, 2001-12-07 at 07:51, Daniel Phillips wrote:
> I did try R5 in htree, and at least a dozen other hashes.  R5 was the worst 
> of the bunch, in terms of uniformity of distribution, and caused a measurable 
> slowdown in Htree performance.  (Not an order of magnitude, mind you, 
> something closer to 15%.)

Did you try the ReiserFS teahash?  I wrote it specifically to address
the issue you mentioned in the paper of an attacker deliberately
generating collisions; the intention was that each directory (or maybe
filesystem) have its own distinct hashing key.

	J

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