Re: Question related to the Hash-Algorithms used for the Ports

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02-22-2008, 12:40 PM

kjell@pintday.org

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Re: Question related to the Hash-Algorithms used for the Ports

> During a report of the german news-website "Heise.de" experts
> (Christian Rechberger and Christophe De Cannihre) on the Crypto2006 (a
> conference) talked about at least one practical attack aggainst SHA-1.

What type of attack? A

>
> The demonstration was made with a limited Version of SHA-1 but
> cryptographic scientist said the attack would also be practical again
> the normal version wich is widly in use.
>
> Rechberger and De Cannihre said that they exspect a even more practical
> attack against the normal SHA1 after some optimisations of their method.
>
> The Ports-System uses MD5 and SHA1 wich are both now, at least for
> cryptographic experts, brocken and not realy trustfull anymore. So 2 of
> 3 Algorithms used by the Ports-System are in fact weak.
> Wouldn`t it be about time to think about alternatives?
> Experts said that SHA 512 may rise the border for an sucessfull attack.
>
> I would like to request the replacement of SHA-1 with SHA512 and to
> kick out MD5 out of the Ports-System.
> Using RipeMD with more bits would be usefull too (Ripe-MD is not
> limited to 160Bits).
>
> MD5 could get replaced with Whirpool wich is recommended by the
> NESSIE-Project and wich is also a ISO-Standard.
> Alternatives could be Tiger2 or HAVAL wich are also considred secure.
>
> I think one of the Problems is that OpenSSL provides just a wide range
> of unsecure HASH-Functons like MD2/4/5 SHA and now also SHA1.
> The only algorithm considred as secure is the Ripe-MD (or rmd)
> algorithm.
>
> So no matter what you`ll do (as developers of OpenBSD) the question
> came up one more time and I think some peoples should start looking for
> alternative HASH-Algorithms used in the Ports.
>
>
> Links for Nessie:
> http://www.cryptonessie.org/
>
> Kind regards,
> Sebastian Rother

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Re: Question related to the Hash-Algorithms used for the Ports