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Re: [Cfrg] Call for adoption: draft-hdevalence-cfrg-ristretto-01

"Filippo Valsorda" <filippo@ml.filippo.io> Wed, 09 October 2019 21:26 UTC

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Date: Wed, 09 Oct 2019 17:25:09 -0400
From: Filippo Valsorda <filippo@ml.filippo.io>
To: cfrg@irtf.org
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Subject: Re: [Cfrg] Call for adoption: draft-hdevalence-cfrg-ristretto-01
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Glad to hear the group decided to adopt the draft, thanks to everyone
who commented and offered feedback.

We are working on draft-irtf-cfrg-ristretto-00 to address the various
comments that came up during and before the adoption call.

I definitely agree that there should be a standard path from non-uniform
inputs to ristretto255 points, and after some experimentation I
am fairly convinced the best solution is for hash-to-curve to
define the input processing (as well as the domain separation)
homogeneously with the other target curves, and then use the
ristretto255 FROM_UNIFORM_BYTES API as the abstraction point. This way
hash-to-curve users will be presented a uniform API, and ristretto255
internal types won't leak into neither the hash-to-curve spec nor its
implementations.

After -00 is ready we'll also look into how much extra work it would be
to add Decaf to the spec. I agree that whether it's a good idea depends
on how much extra complexity it brings in.


2019-10-07 13:08 GMT-04:00 Alexey Melnikov <alexey.melnikov@isode.com>:
> Dear CFRG Participants,
> 
> On 18/09/2019 17:44, Alexey Melnikov wrote:
> > Dear CFRG participants,
> >
> > This email commences a 2-week call for adoption for 
> > draft-hdevalence-cfrg-ristretto-01 that will end on October 2nd 2019:
> >
> >  https://datatracker.ietf.org/doc/draft-hdevalence-cfrg-ristretto/
> >
> > Please give your views on whether this document should be adopted as a 
> > CFRG draft, and if so, whether you'd be willing to help work on 
> > it/review it. Please reply to this email (or in exceptional 
> > circumstances you can email CFRG chairs directly at 
> > cfrg-chairs@ietf.org).
> 
> Based on the mailing list feedback chairs declare that this draft is 
> successfully adopted by CFRG. Authors should submit a new version and 
> reply to comments raised during the adoption call.
> 
> 
> Thank you,
> 
> Alexey (for the chairs)
> 
> 
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