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Re: [Cfrg] Curve selection revisited

"Salz, Rich" <rsalz@akamai.com> Thu, 31 July 2014 17:18 UTC

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From: "Salz, Rich" <rsalz@akamai.com>
To: Russ Housley <housley@vigilsec.com>, IRTF CFRG <cfrg@irtf.org>
Date: Thu, 31 Jul 2014 13:18:40 -0400
Thread-Topic: [Cfrg] Curve selection revisited
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Subject: Re: [Cfrg] Curve selection revisited
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> I would like to see us use of the same curve for digital signature and key
> agreement.  This provides obvious modularity, and it seems to fit well with
> the security protocols that already have support for ECC.

I don't want this requirement because I'd like to use 25519 for DH-style key exchange, without having to give up whatever "standard" curves are being used for signature.  I find the "system" approach to Curve25519 appealing, and the efficiency -- where we might have 100's of hosts on a single IP address with their own PFS requirements -- compelling.

	/r$

--  
Principal Security Engineer
Akamai Technologies, Cambridge MA
IM: rsalz@jabber.me Twitter: RichSalz

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