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Re: [openpgp] AEAD Decryption

Marcus Brinkmann <marcus.brinkmann@rub.de> Mon, 08 August 2022 21:17 UTC

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From: Marcus Brinkmann <marcus.brinkmann@rub.de>
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Date: Mon, 08 Aug 2022 23:16:51 +0200
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Subject: Re: [openpgp] AEAD Decryption
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A useful definition would be that there must not be any observable difference in output, error signaling, or processing time when handling data of the same length that does not have a valid authentication tag.

As for relevance: The abstract of RFC4880 says "It does, however, discuss implementation issues necessary to avoid security flaws.“, which is in line with many other RFCs and in general a good idea.

VG,
Marcus

—
Dipl.-Math. Marcus Brinkmann

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> Am 25.07.2022 um 15:44 schrieb Werner Koch <wk@gnupg.org>:
> 
> On Wed, 20 Jul 2022 20:52, Daniel Kahn Gillmor said:
> 
>> With no hats on, I am also on board with this change.  ensuring that
>> AEAD-protected data is only released when verified is reasonable.
> 
> Define "released".
> 
> OpenPGP is a on-wire protocol specification and not specification of an
> application which implements this protocol.
> 
> 
> Shalom-Salam,
> 
>   Werner
> 
> -- 
> The pioneers of a warless world are the youth that
> refuse military service.             - A. Einstein
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