Re: [openpgp] Disabling compression in OpenPGP

Alfredo Pironti <alfredo.pironti@inria.fr> Thu, 20 March 2014 11:55 UTC

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Date: Thu, 20 Mar 2014 12:55:13 +0100
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From: Alfredo Pironti <alfredo.pironti@inria.fr>
To: Werner Koch <wk@gnupg.org>
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Cc: Gregory Maxwell <gmaxwell@gmail.com>, "openpgp@ietf.org OpenPGP" <openpgp@ietf.org>, Jon Callas <jon@callas.org>
Subject: Re: [openpgp] Disabling compression in OpenPGP
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On Thu, Mar 20, 2014 at 12:25 PM, Werner Koch <wk@gnupg.org> wrote:

> On Wed, 19 Mar 2014 23:58, jon@callas.org said:
>
> > I'm really sorry your ballots got spoiled. But you can fix that with
> > zero changes to software nor protocol.
>
> Yep.
>
> However, this a problem of the voting protocol.


It would be, if the voting protocol was prescribing compression, or was
using ballots of different lengths.

Instead, here OpenPGP is to blame because it silently slips in compression.



>  You would run into the
> same problems if you use a ZIP file with encryption or require to send
> an ODF document.  Both compress stuff; even text editors may do that by
> replacing runs of white space by tabs.
>
> There are a lot of possible failure modes to be investigated which is
> the reason why getting electronic voting right is so hard.
>
>
> Shalom-Salam,
>
>    Werner
>
> --
> Die Gedanken sind frei.  Ausnahmen regelt ein Bundesgesetz.
>
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