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Re: [TLS] RSA-PSS in TLS 1.3

Viktor Dukhovni <ietf-dane@dukhovni.org> Mon, 29 February 2016 17:39 UTC

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Date: Mon, 29 Feb 2016 17:39:45 +0000
From: Viktor Dukhovni <ietf-dane@dukhovni.org>
To: tls@ietf.org
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Subject: Re: [TLS] RSA-PSS in TLS 1.3
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On Mon, Feb 29, 2016 at 09:32:04AM -0800, Joseph Salowey wrote:

> We seem to have good consensus on moving to RSA-PSS and away from PKCS-1.5
> in TLS 1.3.  However, there is a problem that it may take some hardware
> implementations some time to move to RSA-PSS.  After an off list discussion
> with a few folks here is a proposal for moving forward.
> 
> We make RSA-PSS mandatory to implement (MUST implement instead of MUST
> offer).   Clients can advertise support for PKCS-1.5 for backwards
> compatibility in the transition period.
> Please respond on the list on whether you think this is a reasonable way
> forward or not.

My instinct is to mandate PSS and let PKCS#1 rest in peace.

-- 
	Viktor.

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