Re: [TLS] draft-les-white-tls-preferred-pronouns

Peter Gutmann <pgut001@cs.auckland.ac.nz> Thu, 01 April 2021 10:25 UTC

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From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: Lester White <les.white@engineer.com>, "tls@ietf.org" <tls@ietf.org>
Thread-Topic: [TLS] draft-les-white-tls-preferred-pronouns
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Date: Thu, 1 Apr 2021 10:25:18 +0000
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Subject: Re: [TLS] draft-les-white-tls-preferred-pronouns
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Lester White <les.white@engineer.com> writes:

>       Title           : Preferred Pronouns Extension for TLS

I think the Security Considerations section needs to mention two security
considerations, firstly the preferred identity is an unauthenticated parameter
and can't safely be used until the Finished message definitely determines its
validity so it shouldn't be used until after the other side's Finished message
is received, and secondly that the odd-numbered (presumably "prime" is meant)
number of experts needs to be at least 1024 bits worth, and a strong prime,
i.e. p-1 and p+1 should have large prime factors.  The suggested value of 11
doesn't meet these criteria, so should be changed for a value that does.

Peter.