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Date:      Sat, 3 Jan 2009 01:38:25 +0000
From:      RW <rwmaillists@googlemail.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: Foiling MITM attacks on source and ports trees
Message-ID:  <20090103013825.18910bf5@gumby.homeunix.com>
In-Reply-To: <495E4F24.80209@unsane.co.uk>
References:  <20090102164412.GA1258@phenom.cordula.ws> <495E4F24.80209@unsane.co.uk>

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On Fri, 02 Jan 2009 17:30:12 +0000
Vincent Hoffman <vince@unsane.co.uk> wrote:
> Admittedly this doesn't give a file by file checksum

That's not really a problem, it's no easier to create a collision
in a .gz file than a patch file. 

The more substantial weakness is that the key is verified against a
hash stored on the original installation media. If someone went to the
trouble of diverting dns or routing to create a fake FreeBSD site they
would presumably make it self-consistent down to the ISO checksums.



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