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Re: [Cfrg] Adopting "AES-GCM-SIV: Nonce Misuse-Resistant Authenticated Encryption" as a CFRG document ---- Some clarifications

Adam Langley <agl@imperialviolet.org> Tue, 19 April 2016 14:41 UTC

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From: Adam Langley <agl@imperialviolet.org>
To: Fedor Brunner <fedor.brunner@azet.sk>
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Subject: Re: [Cfrg] Adopting "AES-GCM-SIV: Nonce Misuse-Resistant Authenticated Encryption" as a CFRG document ---- Some clarifications
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On Mon, Apr 18, 2016 at 12:21 AM, Fedor Brunner <fedor.brunner@azet.sk> wrote:
> XSalsa20 is Salsa20 cipher with nonce extended to 192 bits. So there is
> no need to manage nonces, they can be generated with RNG. Could you
> please describe applications where you would prefer AES-GCM-SIV over
> XSalsa20+Poly1305

Basically the increasing levels of hardware support for AES-GCM make
it compelling from a performance point of view.

(Storing the extra twelve bytes of nonce /might/ be a concern in some
cases but I'm not sure about that.)


Cheers

AGL

-- 
Adam Langley agl@imperialviolet.org https://www.imperialviolet.org

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