Re: [kitten] [saag] AD sponsoring draft-hansen-scram-sha256

Alexey Melnikov <alexey.melnikov@isode.com> Mon, 16 February 2015 11:10 UTC

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Date: Mon, 16 Feb 2015 11:10:01 +0000
From: Alexey Melnikov <alexey.melnikov@isode.com>
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To: Simon Josefsson <simon@josefsson.org>, Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Subject: Re: [kitten] [saag] AD sponsoring draft-hansen-scram-sha256
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Hi Simon,

On 16/02/2015 09:48, Simon Josefsson wrote:
  [snip]
> A suggested (not even mandated) pbkdf iteration count of at least 4096
> is unchanged since RFC 5802 -- I'd really like to see that be
> significantly higher.  Back in 2000 an iteration count of 1000 was
> recommended as the minimum.  Surely computational power has increased
> more than a factor of four since then.
I've heard complains from developers that 4096 with SHA-1 is too high 
for current Android phones. It would be good to get more information on 
performance before changing the number.