Re: [Cfrg] Adoption of threshold drafts by RG

Watson Ladd <watsonbladd@gmail.com> Mon, 21 September 2020 23:01 UTC

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From: Watson Ladd <watsonbladd@gmail.com>
Date: Mon, 21 Sep 2020 19:00:50 -0400
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To: Phillip Hallam-Baker <phill@hallambaker.com>
Cc: IRTF CFRG <cfrg@irtf.org>
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Subject: Re: [Cfrg] Adoption of threshold drafts by RG
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On Mon, Sep 21, 2020 at 12:25 PM Phillip Hallam-Baker
<phill@hallambaker.com> wrote:
>
> Could the chairs please start the discussion of adoption of my threshold crypto drafts as was promised six months ago and on numerous occasions since?
>
> https://tools.ietf.org/id/draft-hallambaker-threshold-sigs-04.html#draft-hallambaker-threshold
> https://tools.ietf.org/id/draft-hallambaker-threshold-sigs-04.html

My understanding is NIST is carrying out a standardization activity
https://csrc.nist.gov/projects/threshold-cryptography . While that's
by no means a barrier to our adoption, I think alignment with the
results of that activity are valuable.

I would note the schemes described are insecure in the presence of
concurrency, as well. https://eprint.iacr.org/2018/417.pdf explains
some of the issues well, and it's really quite subtle and difficult.
The design of FROST https://eprint.iacr.org/2020/852.pdf solves these
issues, and I don't see any discussion in the draft of them.

Sincerely,
Watson Ladd

--
"Man is born free, but everywhere he is in chains".
--Rousseau.