Re: [Cfrg] 40 bit loop and DragonFly
Trevor Perrin <trevp@trevp.net> Tue, 07 January 2014 02:02 UTC
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Date: Mon, 06 Jan 2014 18:02:02 -0800
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From: Trevor Perrin <trevp@trevp.net>
To: Watson Ladd <watsonbladd@gmail.com>
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Cc: "cfrg@irtf.org" <cfrg@irtf.org>, "Scott Fluhrer (sfluhrer)" <sfluhrer@cisco.com>
Subject: Re: [Cfrg] 40 bit loop and DragonFly
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On Mon, Jan 6, 2014 at 9:18 AM, Watson Ladd <watsonbladd@gmail.com> wrote: > On Mon, Jan 6, 2014 at 8:46 AM, Igoe, Kevin M. <kmigoe@nsa.gov> wrote: >> >> I believe there aren't any insurmountable issues associated >> with DragonFly, but that doesn't mean Dan and the RG don't >> have some work to do. [...] > Why are we still trying to fix Dragonfly? We've got alternatives that > don't have the > significant theoretical issues, don't have the implementation issues, > don't have the IPR issues > (pith and marrow makes me think Dragonfly is covered by SPEKE patent), > and have been > vetted far more extensively. I share Watson's incredulity that Kevin expects further work on Dragonfly. As Watson states, there are better alternatives (SPAKE2, J-PAKE, SRP, AugPAKE, and Elligator-based variants). Dan insists that he wants a balanced EC PAKE without patents, so let's talk about SPAKE2 and J-PAKE. Both have been around for years, have formal security analysis, and are easily implemented without side-channels. Kevin and Dan: please explain why you prefer Dragonfly to these protocols. Trevor
- [Cfrg] 40 bit loop and DragonFly Igoe, Kevin M.
- [Cfrg] 40 long loop, not 40 bit loop Igoe, Kevin M.
- Re: [Cfrg] 40 bit loop and DragonFly Stephen Farrell
- [Cfrg] On interpreting IPR in the IETF Paul Hoffman
- Re: [Cfrg] 40 bit loop and DragonFly Scott Fluhrer (sfluhrer)
- Re: [Cfrg] 40 bit loop and DragonFly Igoe, Kevin M.
- Re: [Cfrg] 40 bit loop and DragonFly Watson Ladd
- Re: [Cfrg] 40 bit loop and DragonFly Trevor Perrin
- Re: [Cfrg] 40 bit loop and DragonFly David Jacobson
- Re: [Cfrg] 40 bit loop and DragonFly Dan Harkins
- Re: [Cfrg] 40 bit loop and DragonFly Watson Ladd
- Re: [Cfrg] 40 bit loop and DragonFly Dan Harkins
- Re: [Cfrg] 40 bit loop and DragonFly Feng Hao
- Re: [Cfrg] 40 bit loop and DragonFly Watson Ladd