Re: [MLS] ChaChaX
Brendan McMillion <brendan@cloudflare.com> Mon, 10 August 2020 19:36 UTC
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From: Brendan McMillion <brendan@cloudflare.com>
Date: Mon, 10 Aug 2020 12:36:22 -0700
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To: Richard Barnes <rlb@ipv.sx>
Cc: Messaging Layer Security WG <mls@ietf.org>
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Subject: Re: [MLS] ChaChaX
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Sorry, I suppose the real name is XChaCha and it's defined here: https://tools.ietf.org/html/draft-irtf-cfrg-xchacha-01 XChaCha has a 24 byte nonce and is meant to be more suitable for randomly generated nonces On Mon, Aug 10, 2020 at 12:31 PM Richard Barnes <rlb@ipv.sx> wrote: > Hey Brendan, > > I'm not sure I follow. Could you clarify what you mean by ChaChaX, and > how it's different from base ChaCha? Where by "base ChaCha", I mean RFC > 8439. > > https://tools.ietf.org/html/rfc8439 > > Thanks, > --Richard > > On Mon, Aug 10, 2020 at 2:03 PM Brendan McMillion <brendan= > 40cloudflare.com@dmarc.ietf.org> wrote: > >> Hello mls@ >> >> I wanted to quickly poll the list on a somewhat annoying issue. >> Currently, every time we encrypt with our AEAD we use an unstructured >> nonce: sender data encryption is properly random, while HPKE and message >> encryption use the output of a KDF which is as good as random. Accordingly, >> we should be using ChaChaX instead of ChaCha. >> >> Does everyone else agree? Should I open these PRs? >> _______________________________________________ >> MLS mailing list >> MLS@ietf.org >> https://www.ietf.org/mailman/listinfo/mls >> >
- [MLS] ChaChaX Brendan McMillion
- Re: [MLS] ChaChaX Richard Barnes
- Re: [MLS] ChaChaX Brendan McMillion
- Re: [MLS] ChaChaX Richard Barnes