[p2p-hackers] SHA1 broken?

Eric Murray ericm at lne.com
Wed Feb 16 07:31:23 PST 2005


On Wed, Feb 16, 2005 at 07:55:15AM -0500, R.A. Hettinga wrote:
> From: "Serguei Osokine" <osokin at osokin.com>
> To: "Peer-to-peer development." <p2p-hackers at zgp.org>
> Subject: RE: [p2p-hackers] SHA1 broken?
> Date: Wed, 16 Feb 2005 00:11:07 -0800
> 
> Okay, so the effective SHA-1 length is 138 bits instead of full
> 160 - so what's the big deal? It is still way more than, say, MD5

In applications where collisions are important, SHA1 is now
effectively 69 bits as opposed to 80.

That's not very much, and odds are there will be an improvement on
this attack in the near future. 

Eric





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