Re: [Cfrg] Formal request from TLS WG to CFRG for new elliptic curves

"Dan Harkins" <dharkins@lounge.org> Wed, 16 July 2014 22:30 UTC

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References: <CFE9F2DE.26E5A%kenny.paterson@rhul.ac.uk> <87d2d5aspu.fsf@latte.josefsson.org>
Date: Wed, 16 Jul 2014 15:30:15 -0700 (PDT)
From: "Dan Harkins" <dharkins@lounge.org>
To: "Simon Josefsson" <simon@josefsson.org>
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Subject: Re: [Cfrg] Formal request from TLS WG to CFRG for new elliptic curves
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On Wed, July 16, 2014 2:39 pm, Simon Josefsson wrote:
> "Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk>; writes:
>>    R12.  Required for PAKE: indistinguishability of curve points from
>>    random strings [2]
>
> I do not see why this is a desirable property for TLS, or other IETF
> areas, so I disagree it should be a requirement.

  WIthout rehashing a TLS thread, not all sockets in the world connect
to port 443 and TLS is not synonymous with HTTPS. There are valid
uses of a PAKE with TLS, they just aren't browser-based.

  In addition, the numerous IETF documents that misuse PSKs
(MSCHAPv*, IKEv*, numerous TLS-PSK ciphersuites, EAP-PSK, etc)
would seem to suggest that we should have a nice way to use them
correctly.

  I support requirement R12.

  regards,

  Dan.