Re: [PATCH v6] security/keys: rewrite all of big_key crypto

[Stephan Mueller]

Am Mittwoch, 20. September 2017, 12:52:21 CEST schrieb Jason A. Donenfeld:

Hi Jason,

> 
> This sounds incorrect to me.  Choosing a fresh, random, one-time-use
> 256-bit key and rolling with a zero nonce is a totally legitimate way
> of using GCM. There's no possible reuse of the key stream this way.
> However, on the off chance that you know what you're talking about,
> could you outline the cryptographic attack you have in mind, or if
> that's too difficult, simply link to the relevant paper on eprint?

http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/Joux_comments.pdf

Ciao
Stephan