Re: [Cfrg] Call for adoption: draft-yonezawa-pairing-friendly-curves

Dear colleagues:

I am neutral with respect to adoption of this draft.

I do have an organizational remark regarding CFRG work items, though: if 
this draft is adopted by the CFRG as a working group document, I would 
suggest moving the description of the curves isogenous to BLS-12-381 as 
described in Appendix C of draft-irtf-cfrg-hash-to-curve-04 to the 
pairing curve document, so as to keep the curve mapping document clean 
and keep all core pairing-related stuff in one document.

Section 2.5:
a) s = s_0 + s_1 * p + ... + s_{d - 1} * i^{d - 1} should read s = s_0 + 
s_1 * i + ... + s_{d - 1} * i^{d - 1}, since it is a polynomial in 
indeterminate i.
b) Is there a a reason to represent this as s = s_0 + s_1 * p + ... + 
s_{d - 1} * p^{d - 1}, in lowest-coefficient-first order, rather than in 
highest-coefficient-first order? Why not represent this as 
right-concatenation of the representation of the polynomial coefficients 
s_0, ..., s_{d-1} in GF(p) instead, so each of these can be easily 
extracted individually?
c) The IEEE 1363a-2004 specification referenced is not publicly 
available (well, without paying ~ $100).

Best regards, Rene

On 9/6/2019 7:36 AM, Paterson Kenneth wrote:
> Dear CFRG,
>
> This email commences a 2-week call for adoption for draft-yonezawa-pairing-friendly-curves:
>
> https://datatracker.ietf.org/doc/draft-yonezawa-pairing-friendly-curves/
>
> 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.
>
> Thanks,
>
> Kenny (for the chairs)
>
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