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Re: [Cfrg] SIV for non-AES ciphers first draft

Tony Arcieri <bascule@gmail.com> Wed, 23 January 2019 15:41 UTC

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From: Tony Arcieri <bascule@gmail.com>
Date: Wed, 23 Jan 2019 07:41:12 -0800
Message-ID: <CAHOTMV+FU-HqmdZa39py8Up1dFz_wLLa4AED1efJ32XeLOLx+Q@mail.gmail.com>
To: Neil Madden <neil.e.madden@gmail.com>
Cc: "Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk>, "cfrg@irtf.org" <cfrg@irtf.org>
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Subject: Re: [Cfrg] SIV for non-AES ciphers first draft
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On Wed, Jan 23, 2019 at 3:31 AM Neil Madden <neil.e.madden@gmail.com> wrote:

> Is the following a fair summary of what you would like to see included?
>
> 1. Include a KDF to derive per-message keys from an explicit nonce, rather
> than taking a single key that is split into two halves.
>
> 2. Move the SIV to be appended to the ciphertext rather than prepended.
>
> 3. Describe how to instantiate an SIV mode with a universal hash function
> using the approach from AES-GCM-SIV.
>

That's the general idea, yes. I'm not saying it's the only way, but I think
it's worth exploring.

Really I mention this just in case other members of the group were getting
hung up on the details. We can hammer them out after the adoption call ;)

-- 
Tony Arcieri

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