Re: [Cfrg] Ristretto VRF? (was: I-D Action: draft-irtf-cfrg-vrf-04.txt)

Thanks, Tony! Yes, a Ristretto VRF makes sense, probably at the same time
as the Ristretto draft moves forward.

On Fri, Feb 8, 2019 at 6:09 PM Tony Arcieri <bascule@gmail.com> wrote:

> I'm curious... with a Ristretto draft now available[1], would it be worth
> considering the inclusion of a Ristretto VRF in draft-irtf-cfrg-vrf?
>
> From a "running code" perspective, implementing the ECVRF described in
> this draft in terms of Ristretto is something that is already
> happening[2][3].
>
> [1]: https://tools.ietf.org/html/draft-hdevalence-cfrg-ristretto-00
> [2]:
> https://github.com/CleverCloud/biscuit/blob/master/DESIGN.md#elliptic-curve-verifiable-random-functions
> [3]: https://github.com/CleverCloud/biscuit/pull/10
>
> On Fri, Feb 8, 2019 at 2:32 PM <internet-drafts@ietf.org> wrote:
>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the Crypto Forum RG of the IRTF.
>>
>>         Title           : Verifiable Random Functions (VRFs)
>>         Authors         : Sharon Goldberg
>>                           Leonid Reyzin
>>                           Dimitrios Papadopoulos
>>                           Jan Vcelak
>>         Filename        : draft-irtf-cfrg-vrf-04.txt
>>         Pages           : 42
>>         Date            : 2019-02-08
>>
>> Abstract:
>>    A Verifiable Random Function (VRF) is the public-key version of a
>>    keyed cryptographic hash.  Only the holder of the private key can
>>    compute the hash, but anyone with public key can verify the
>>    correctness of the hash.  VRFs are useful for preventing enumeration
>>    of hash-based data structures.  This document specifies several VRF
>>    constructions that are secure in the cryptographic random oracle
>>    model.  One VRF uses RSA and the other VRF uses Eliptic Curves (EC).
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-irtf-cfrg-vrf/
>>
>> There are also htmlized versions available at:
>> https://tools.ietf.org/html/draft-irtf-cfrg-vrf-04
>> https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-vrf-04
>>
>> A diff from the previous version is available at:
>> https://www.ietf.org/rfcdiff?url2=draft-irtf-cfrg-vrf-04
>>
>>
>> Please note that it may take a couple of minutes from the time of
>> submission
>> until the htmlized version and diff are available at tools.ietf.org.
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
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>>
>
>
> --
> Tony Arcieri
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