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RE: Stephen Farrell's Discuss on draft-ietf-6man-stable-privacy-addresses-16: (with DISCUSS and COMMENT)

Christian Huitema <huitema@microsoft.com> Mon, 03 February 2014 19:06 UTC

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From: Christian Huitema <huitema@microsoft.com>
To: "l.wood@surrey.ac.uk" <l.wood@surrey.ac.uk>, "fgont@si6networks.com" <fgont@si6networks.com>, "stephen.farrell@cs.tcd.ie" <stephen.farrell@cs.tcd.ie>, "iesg@ietf.org" <iesg@ietf.org>
Subject: RE: Stephen Farrell's Discuss on draft-ietf-6man-stable-privacy-addresses-16: (with DISCUSS and COMMENT)
Thread-Topic: Stephen Farrell's Discuss on draft-ietf-6man-stable-privacy-addresses-16: (with DISCUSS and COMMENT)
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Date: Mon, 03 Feb 2014 19:05:15 +0000
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References: <20140121155253.23475.70004.idtracker@ietfa.amsl.com>, <52DE9E63.5050404@si6networks.com> <290E20B455C66743BE178C5C84F1240847E63346D8@EXMB01CMS.surrey.ac.uk>
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Cc: "6man-chairs@tools.ietf.org" <6man-chairs@tools.ietf.org>, "ipv6@ietf.org" <ipv6@ietf.org>, "draft-ietf-6man-stable-privacy-addresses@tools.ietf.org" <draft-ietf-6man-stable-privacy-addresses@tools.ietf.org>
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> MD5 is still useful as a checksum for really big files, where you're looking for accidental differences introduced by errors, and MD5's efficiency of computation is a win. But that says nothing about being tamper-proof. Think of it as a big CRC32, and CRC32 is not seen as having security properties.

But then, for applications like that, you can also use CRC64.

-- Christian Huitema

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