Re: [Cfrg] revised requirements for new curves
"Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk> Mon, 08 September 2014 15:10 UTC
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From: "Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "cfrg@irtf.org" <cfrg@irtf.org>
Thread-Topic: [Cfrg] revised requirements for new curves
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Date: Mon, 08 Sep 2014 15:10:08 +0000
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Archived-At: http://mailarchive.ietf.org/arch/msg/cfrg/gohUWP_20wM3V2_XaNbBqHi_76Q
Subject: Re: [Cfrg] revised requirements for new curves
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Hi Stephen, On 08/09/2014 15:42, "Stephen Farrell" <stephen.farrell@cs.tcd.ie> wrote: >Hiya, > >Good job and good to see this progressing towards completion. >Thanks for both. > >On 08/09/14 11:23, Paterson, Kenny wrote: >> >> SE5. Required: each set of curve parameters should be generated by a >> well-defined procedure that allows only a limited and quantified amount >>of >> flexibility. If the selected procedure involves the choice of an initial >> seed, then the seed will be selected by multiple independent parties >>using >> a procedure having the property that no collusion of all but one or >>fewer >> of the parties can exert any control over the chosen seed. [RC] > >A clarification question: the above reads a bit like the result >has to be a curve that hasn't yet been documented. I assume that >its ok if e.g. 25519 and/or one of msft's are picked and that this >is not meant to rule those out. That's correct - it's not meant to rule these out. The intention is that, for a specific, existing curve like Curve25519 or one of the MSR curves, this requirement would mean the publication of a clear selection rationale and an evaluation of how much flexibility was exercised during the selection. >It might be worth stating that e.g. >along the lines of "Note that SE5 does not rule out selection of >an already documented curve or curves should there be consensus >that this requirement has been met sufficiently." OK, this could certainly be added. > >If you do mean to rule those out, then I think that really would >need to be crystal clear. > >Other than that: > >On IN1 and IN2 I agree with William's comment. And since that >is to the effect that those don't help or hinder selections >I'm ok with the text as-is. OK, good to know. >On IP1, I do agree with the intent, but that might need to be >reworded to keep everyone happy - one can never know for sure >that royalty-free anything is possible. But I'm ok with the >wording as-is, since adding the equivalent of "as far as its >possible to know" doesn't matter so much given that CFRG cannot >afaik yet do the impossible;-) Understood. So some fine-tuning might be merited here. Cheers Kenny > >Ta, >S.
- Re: [Cfrg] revised requirements for new curves Paterson, Kenny
- Re: [Cfrg] revised requirements for new curves William Whyte
- Re: [Cfrg] revised requirements for new curves Manuel Pégourié-Gonnard
- Re: [Cfrg] revised requirements for new curves Phillip Hallam-Baker
- Re: [Cfrg] revised requirements for new curves Stephen Farrell
- Re: [Cfrg] revised requirements for new curves Paterson, Kenny
- Re: [Cfrg] revised requirements for new curves Paterson, Kenny
- Re: [Cfrg] revised requirements for new curves Watson Ladd
- Re: [Cfrg] revised requirements for new curves Paterson, Kenny
- Re: [Cfrg] revised requirements for new curves David Jacobson
- Re: [Cfrg] revised requirements for new curves Manuel Pégourié-Gonnard
- Re: [Cfrg] revised requirements for new curves D. J. Bernstein
- Re: [Cfrg] revised requirements for new curves Michael Hamburg
- Re: [Cfrg] revised requirements for new curves Paterson, Kenny
- Re: [Cfrg] revised requirements for new curves Adam Langley
- Re: [Cfrg] revised requirements for new curves Paterson, Kenny
- Re: [Cfrg] revised requirements for new curves Adam Langley
- Re: [Cfrg] revised requirements for new curves Damien Miller
- Re: [Cfrg] revised requirements for new curves Damien Miller
- Re: [Cfrg] revised requirements for new curves Torsten Schuetze
- Re: [Cfrg] revised requirements for new curves Eric Rescorla
- Re: [Cfrg] revised requirements for new curves Markulf Kohlweiss
- Re: [Cfrg] revised requirements for new curves Phillip Hallam-Baker
- Re: [Cfrg] revised requirements for new curves Alyssa Rowan
- Re: [Cfrg] revised requirements for new curves Michael Hamburg
- Re: [Cfrg] revised requirements for new curves Phillip Hallam-Baker
- Re: [Cfrg] revised requirements for new curves Michael Hamburg
- Re: [Cfrg] revised requirements for new curves Andrey Jivsov
- Re: [Cfrg] revised requirements for new curves Andrey Jivsov