Re: [TLS] A closer look at ROBOT, BB Attacks, timing attacks in general, and what we can do in TLS

Ilari Liusvaara <ilariliusvaara@welho.com> Fri, 15 December 2017 17:46 UTC

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Date: Fri, 15 Dec 2017 19:46:28 +0200
From: Ilari Liusvaara <ilariliusvaara@welho.com>
To: Andrei Popov <Andrei.Popov@microsoft.com>
Cc: Colm =?utf-8?Q?MacC=C3=A1rthaigh?= <colm@allcosts.net>, "tls@ietf.org" <tls@ietf.org>
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Subject: Re: [TLS] A closer look at ROBOT, BB Attacks, timing attacks in general, and what we can do in TLS
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On Fri, Dec 15, 2017 at 02:57:33PM +0000, Andrei Popov wrote:
> From: TLS [mailto:tls-bounces@ietf.org] On Behalf Of Ilari Liusvaara
> > Even nastier dependency: SHA-2. If that breaks, currently both TLS
> > 1.2 and 1.3 break. There are no alternatives defined.
> 
> Here's an attempt to define a SHA-2 alternative: https://tools.ietf.org/html/draft-wconner-blake2sigs-01

Also would need TLS ciphersuite codepoints with alternative handshake
hash algorithms.


-Ilari