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

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02-22-2008, 12:40 PM

=?ISO-8859-1?Q?Martin_Schr=F6der?=

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

2006/8/24, Joachim Schipper <j.schipper@math.uu.nl>:
> The current spade of attacks against MD5 and SHA1 are interesting and
> cause for concern; however, they are birthday attacks - the attacker can
> produce two (to a certain extent, arbitrarily chosen by the attacker)
> plaintexts which produce the same hash.
>
> However, in the ports system, an attacker would have to create a
> collision with a known plaintext (in other words, find a file that has
> the same hash as a known file). This is an entirely different, and much
> more difficult attack. And that completely ignores the fact that what
> you discover must be at least a proper gzip file, containing a proper
> tar archive, and probably should contain a mostly-functional version of
> the program.

This seems to be possible to a certain extend.

The heise article is here:
http://www.heise.de/newsticker/meldung/77235
babelfish: http://tinyurl.com/ojss8

Here are some references:
http://www.iaik.tugraz.at/aboutus/pe...rger/index.php

Best
Martin

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SEO

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