Re: [CFRG] Small subgroup question for draft-irtf-cfrg-hash-to-curve
"Scott Fluhrer (sfluhrer)" <sfluhrer@cisco.com> Fri, 09 April 2021 18:17 UTC
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From: "Scott Fluhrer (sfluhrer)" <sfluhrer@cisco.com>
To: Mike Hamburg <mike@shiftleft.org>, "Hao, Feng" <Feng.Hao@warwick.ac.uk>
CC: CFRG <cfrg@irtf.org>
Thread-Topic: [CFRG] Small subgroup question for draft-irtf-cfrg-hash-to-curve
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Date: Fri, 09 Apr 2021 18:17:15 +0000
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Subject: Re: [CFRG] Small subgroup question for draft-irtf-cfrg-hash-to-curve
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Opaque doesn’t use a hash-to-curve operation. CPace does; it also automatically aborts (fails) if the hash-to-curve operation happens to return a low order point (that is, a point that, after multiplying by the cofactor, is the neutral element). From: CFRG <cfrg-bounces@irtf.org> On Behalf Of Mike Hamburg Sent: Friday, April 9, 2021 1:00 PM To: Hao, Feng <Feng.Hao@warwick.ac.uk> Cc: CFRG <cfrg@irtf.org> Subject: Re: [CFRG] Small subgroup question for draft-irtf-cfrg-hash-to-curve I don’t know if the same holds for OPAQUE or CPace: for all I know, they may have specification holes and/or end in failure in that case.
- [CFRG] Comment on draft-irtf-cfrg-hash-to-curve-10 Daira Hopwood
- Re: [CFRG] Comment on draft-irtf-cfrg-hash-to-cur… Daira Hopwood
- Re: [CFRG] Comment on draft-irtf-cfrg-hash-to-cur… Christopher Wood
- Re: [CFRG] Comment on draft-irtf-cfrg-hash-to-cur… Stanislav V. Smyshlyaev
- [CFRG] Small subgroup question for draft-irtf-cfr… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Loup Vaillant-David
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Russ Housley
- Re: [CFRG] Small subgroup question for draft-irtf… Richard Outerbridge
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Scott Fluhrer (sfluhrer)
- Re: [CFRG] Small subgroup question for draft-irtf… Scott Fluhrer (sfluhrer)
- Re: [CFRG] Small subgroup question for draft-irtf… Rene Struik
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Scott Fluhrer (sfluhrer)
- Re: [CFRG] Small subgroup question for draft-irtf… Armando Faz
- Re: [CFRG] Small subgroup question for draft-irtf… Loup Vaillant-David
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… rsw
- Re: [CFRG] Small subgroup question for draft-irtf… Björn Haase
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… rsw
- [CFRG] please use real names (was: Re: Small subg… Rene Struik
- Re: [CFRG] Small subgroup question for draft-irtf… Hugo Krawczyk
- Re: [CFRG] Small subgroup question for draft-irtf… Rene Struik
- Re: [CFRG] Small subgroup question for draft-irtf… Watson Ladd
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Rene Struik
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] Small subgroup question for draft-irtf… Watson Ladd
- Re: [CFRG] Small subgroup question for draft-irtf… rsw
- Re: [CFRG] Small subgroup question for draft-irtf… Loup Vaillant-David
- Re: [CFRG] Small subgroup question for draft-irtf… Riad S. Wahby
- Re: [CFRG] please use real names (was: Re: Small … Filippo Valsorda
- Re: [CFRG] please use real names (was: Re: Small … Scott Arciszewski
- Re: [CFRG] please use real names (was: Re: Small … Daniel Franke
- Re: [CFRG] please use real names (was: Re: Small … Watson Ladd
- Re: [CFRG] please use real names (was: Re: Small … Michael StJohns
- Re: [CFRG] please use real names (was: Re: Small … Henry de Valence
- Re: [CFRG] please use real names (was: Re: Small … Dan Harkins
- Re: [CFRG] Small subgroup question for draft-irtf… Hugo Krawczyk
- Re: [CFRG] please use real names (was: Re: Small … Peter Gutmann
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] please use real names (was: Re: Small … Squeamish Ossifrage
- Re: [CFRG] please use real names (was: Re: Small … Blumenthal, Uri - 0553 - MITLL
- Re: [CFRG] Small subgroup question for draft-irtf… Stanislav V. Smyshlyaev
- Re: [CFRG] Small subgroup question for draft-irtf… Björn Haase
- Re: [CFRG] please use real names (was: Re: Small … Soatok Dreamseeker
- Re: [CFRG] please use real names (was: Re: Small … Blumenthal, Uri - 0553 - MITLL
- Re: [CFRG] please use real names (was: Re: Small … Soatok Dreamseeker
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] please use real names (was: Re: Small … Daniel Franke
- Re: [CFRG] please use real names (was: Re: Small … Mike Hamburg
- Re: [CFRG] Small subgroup question for draft-irtf… Mike Hamburg
- Re: [CFRG] please use real names (was: Re: Small … Colin Perkins
- Re: [CFRG] please use real names (was: Re: Small … Blumenthal, Uri - 0553 - MITLL
- Re: [CFRG] please use real names (was: Re: Small … Soatok Dreamseeker
- Re: [CFRG] please use real names (was: Re: Small … Mike Hamburg
- Re: [CFRG] please use real names (was: Re: Small … Michael StJohns
- Re: [CFRG] Small subgroup question for draft-irtf… Hao, Feng
- Re: [CFRG] please use real names (was: Re: Small … Michael Sierchio
- [CFRG] Closure (was Re: Small subgroup question f… Hao, Feng
- Re: [CFRG] please use real names (was: Re: Small … Phillip Hallam-Baker
- Re: [CFRG] please use real names (was: Re: Small … Peter Gutmann
- Re: [CFRG] please use real names (was: Re: Small … David Jacobson
- Re: [CFRG] please use real names (was: Re: Small … Julia Hesse
- Re: [CFRG] Closure (was Re: Small subgroup questi… Armando Faz
- Re: [CFRG] Closure (was Re: Small subgroup questi… Hao, Feng
- Re: [CFRG] Closure (was Re: Small subgroup questi… Mike Hamburg
- Re: [CFRG] thoughts on clearing the cofactor in h… Loup Vaillant-David
- Re: [CFRG] Comment on draft-irtf-cfrg-hash-to-cur… Stanislav V. Smyshlyaev
- Re: [CFRG] Comment on draft-irtf-cfrg-hash-to-cur… Daira Hopwood
- Re: [CFRG] Comment on draft-irtf-cfrg-hash-to-cur… Riad S. Wahby
- [CFRG] (suggested language re mixing square roots… Rene Struik
- Re: [CFRG] Comment on draft-irtf-cfrg-hash-to-cur… Loup Vaillant-David
- Re: [CFRG] Comment on draft-irtf-cfrg-hash-to-cur… Daira Hopwood
- Re: [CFRG] (suggested language re mixing square r… Daira Hopwood
- Re: [CFRG] (suggested language re mixing square r… Rene Struik
- Re: [CFRG] please use real names (was: Re: Small … isis agora lovecruft