Re: [Cfrg] PAKE Selection Process: Round 2, Stage 2
"Stanislav V. Smyshlyaev" <smyshsv@gmail.com> Mon, 09 December 2019 15:45 UTC
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From: "Stanislav V. Smyshlyaev" <smyshsv@gmail.com>
Date: Mon, 09 Dec 2019 18:45:23 +0300
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To: Watson Ladd <watsonbladd@gmail.com>
Cc: CFRG <cfrg@irtf.org>, crypto-panel@irtf.org
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Subject: Re: [Cfrg] PAKE Selection Process: Round 2, Stage 2
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Dear Watson, Thanks, but we're still collecting the questions, the authors (including you for SPAKE2) will have time at Stage 3 (December 25th - February, 10th) to prepare the replies (Stage 3: "The authors of the candidates prepare their replies to the additional questions/requested clarifications."). пн, 9 дек. 2019 г. в 18:41, Watson Ladd <watsonbladd@gmail.com>: > > > On Mon, Dec 9, 2019 at 4:44 AM Stanislav V. Smyshlyaev <smyshsv@gmail.com> > wrote: > >> Dear CFRG, >> >> According to the plan of Round 2 of the PAKE selection process, >> additional questions for all four remaining candidates have been collected >> from CFRG participants (and Crypto Review Panel members) via >> crypto-panel@irtf.org . >> >> We've obtained the following list of questions: >> 1) (to SPAKE2): Can you propose a modification of SPAKE2 (preserving all >> existing good properties of PAKE2) with a correspondingly updated security >> proof, addressing the issue of a single discrete log relationship necessary >> for the security of all sessions (e.g., solution based on using >> M=hash2curve(A|B), N=hash2curve(B|A))? >> > > Yes: See https://github.com/kaduk/spake2/pull/10 and for the security > proof, https://eprint.iacr.org/2019/1194. I'll submit it shortly, but > this should indicate where we are going. > > 2) (to CPace and AuCPace): Can you propose a modification of CPace and >> AuCPace (preserving all existing good properties of these PAKEs) with a >> correspondingly updated security proof (maybe, in some other security >> models), addressing the issue of requiring the establishment of a session >> identifier (sid) during each call of the protocol for the cost of one >> additional message? >> 3) (to all 4 remaining PAKEs) : Can the nominators/developers of the >> protocols please re-evaluate possible IPR conflicts between their >> candidates protocols and own and foreign patents? Specifically, can you >> discuss the impact of U.S. Patent 7,047,408 (expected expiration 10th of >> march 2023) on free use of SPAKE2 and the impact of EP1847062B1 (HMQV, >> expected expiration October 2026) on the free use of the RFC-drafts for >> OPAQUE? >> > > I'm not a patent lawyer, or any kind of lawyer. This sounds like a > question for a patent lawyer, rather then uninformed speculation on the > list. > > 4) (to all 4 remaining PAKEs) What can be said about the property of >> "quantum annoyance" (an attacker with a quantum computer needs to solve >> [one or more] DLP per password guess) of the PAKE? >> > > I'll have to look at the papers some more. Will answer in a few days. > > 5) (to all 4 remaining PAKEs) What can be said about "post-quantum >> preparedness" of the PAKE? >> > > There isn't a great answer here for SPAKE2 AKAIK. Postquantum primitives > don't smoothly translate point addition or group laws. > > >> Please let the chairs and the Crypto Review Panel members know (before >> December, 17th) if any questions (collected via crypto-panel@irtf.org) >> have been lost or misinterpreted (or something needs to be added). >> >> Best regards, >> Stanislav, >> CFRG Secretary >> _______________________________________________ >> Cfrg mailing list >> Cfrg@irtf.org >> https://www.irtf.org/mailman/listinfo/cfrg >> >
- [Cfrg] PAKE Selection Process: Round 2, Stage 2 Stanislav V. Smyshlyaev
- Re: [Cfrg] PAKE Selection Process: Round 2, Stage… Watson Ladd
- Re: [Cfrg] PAKE Selection Process: Round 2, Stage… Stanislav V. Smyshlyaev
- Re: [Cfrg] PAKE Selection Process: Round 2, Stage… steve
- Re: [Cfrg] PAKE Selection Process: Round 2, Stage… steve