[16919] in cryptography@c2.net mail archive
Re: SHA-1 cracked
daemon@ATHENA.MIT.EDU (John Kelsey)
Thu Feb 17 07:59:01 2005
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Wed, 16 Feb 2005 12:48:32 -0500 (GMT-05:00)
From: John Kelsey <kelsey.j@ix.netcom.com>
Reply-To: John Kelsey <kelsey.j@ix.netcom.com>
To: "Steven M. Bellovin" <smb@cs.columbia.edu>,
cryptography@metzdowd.com
>From: "Steven M. Bellovin" <smb@cs.columbia.edu>
>Sent: Feb 15, 2005 11:29 PM
>To: cryptography@metzdowd.com
>Subject: SHA-1 cracked
>According to Bruce Schneier's blog
>(http://www.schneier.com/blog/archives/2005/02/sha1_broken.html), a
>team has found collisions in full SHA-1. It's probably not a practical
>threat today, since it takes 2^69 operations to do it and we haven't
>heard claims that NSA et al. have built massively parallel hash
>function collision finders, but it's an impressive achievement
>nevertheless -- especially since it comes just a week after NIST stated
>that there were no successful attacks on SHA-1.
Well, there *weren't* any a week ago....
> --Prof. Steven M. Bellovin, http://www.cs.columbia.edu/~smb
--John Kelsey
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