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Re: [CFRG] draft-westerbaan-cfrg-hpke-xyber768d00

Bas Westerbaan <bas@cloudflare.com> Fri, 19 May 2023 14:23 UTC

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From: Bas Westerbaan <bas@cloudflare.com>
Date: Fri, 19 May 2023 16:23:36 +0200
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To: IRTF CFRG <cfrg@irtf.org>
Cc: Chris Wood <chriswood@cloudflare.com>
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Subject: Re: [CFRG] draft-westerbaan-cfrg-hpke-xyber768d00
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Hi all,

Thanks for your comments and reviews.

Some updates:

- IANA assigned a codepoint for -02. [1]
- Go support landed in CIRCL. [2]
- Rust support in fork of rust-hpke [3]
- ohttp support in Rust [4] (thanks Martin!) and Go [5].

Best,

 Bas

---
[1] https://www.iana.org/assignments/hpke/

Value: 0x0030
KEM: X25519Kyber768Draft00
Nsecret: 64
Nenc: 1120
Npk: 1216
Nsk: 2432
Auth: no
Reference: draft-westerbaan-cfrg-hpke-xyber768d00-02

[2] https://github.com/cloudflare/circl
[3] https://github.com/rozbb/rust-hpke/pull/43
[4] https://github.com/martinthomson/ohttp/ version 0.4.0, requires "pq"
feature
[5] https://github.com/chris-wood/ohttp-go

On Fri, Apr 7, 2023 at 9:57 PM Bas Westerbaan <bas@cloudflare.com> wrote:

> Hi,
>
> For early deployment of post-quantum ECH and OHTTP, we need a codepoint
> for a post-quantum HPKE suite. I think a natural choice would be the
> combination of DHKEM(X25519,KDF_SHA256) and Kyber768Draft00 described in
> the following I-D.
>
> https://datatracker.ietf.org/doc/draft-westerbaan-cfrg-hpke-xyber768d00/
>
> Happy to hear your thoughts.
>
> Best,
>
>  Bas
>

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