[Servercert-wg] Ed25519 certificates

[Tomas Gustavsson]

When EdDSA came up the last time, I remember an opinion was that it would be better to save the work to post quantum algorithms. Even though Ed25519 is a nice algorithm, I kind of agree with that. Moving to PQC will be more work that needs to be done, while Ed25519 seems like a nice-to-have for TLS server certificates? Does eDelivery really need publicly trusted Web PKI certificates?

Regards,
Tomas


________________________________
From: Servercert-wg <servercert-wg-bounces at cabforum.org> on behalf of Inigo Barreira via Servercert-wg <servercert-wg at cabforum.org>
Sent: Monday, June 10, 2024 4:21 PM
To: Ben Wilson <bwilson at mozilla.com>; CA/B Forum Server Certificate WG Public Discussion List <servercert-wg at cabforum.org>; Q Misell <q at as207960.net>
Subject: Re: [Servercert-wg] Ed25519 certificates


FYI. TBD next week at the ETSI ESI meeting.



Title: Proposed CR#7 on TS 119 312: Introduce EdDSA incl. its variants (Ed448 and Ed25519)



Source: European Commission

Abstract: ETSI TS 119 312 provides guidance on selection of cryptographic suites with particular emphasis on interoperability. The Edwards-Curve Digital Signature Algorithm (EdDSA) is a state-of-the-art algorithm for electronic signatures. It is recommended by experts in cryptography and information security and adopted in many Internet security applications and specifications. Unfortunately, the currently published version of TS 119 312 does not reference EdDSA. This change request proposes to add EdDSA as a recommended digital signature algorithm to TS 119 312. The European Commission’s eDelivery Building Block is updating its eDelivery AS4 guidelines and would like to use EdDSA as digital signature algorithm in the updated version. Addition of EdDSA to TS 119 312 would contribute to the continued broad adoption of eDelivery AS4 as an interoperable, open standards-based eDelivery solution based on state-of-the-art security.



De: Servercert-wg <servercert-wg-bounces at cabforum.org> En nombre de Ben Wilson via Servercert-wg
Enviado el: sábado, 8 de junio de 2024 19:28
Para: Q Misell <q at as207960.net>; CA/B Forum Server Certificate WG Public Discussion List <servercert-wg at cabforum.org>
Asunto: Re: [Servercert-wg] Ed25519 certificates



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Hi Q,

I'm checking with the crypto team here at Mozilla and will let you know from our perspective.

Thanks,

Ben



On Sat, Jun 8, 2024 at 4:39 AM Q Misell via Servercert-wg <servercert-wg at cabforum.org<mailto:servercert-wg at cabforum.org>> wrote:

Hi all,



At the Tor meeting a few weeks ago I had some discussions with people asking why Ed25519 certificates are not allowed under the BR (§ 6.1.5). As far as I can tell there isn't much of a reason not to allow Ed25519 certs (if a CA wishes to support them ofc) and there were a few scenarios presented to me where Ed25519 certs would be useful in the context of Tor, which already makes heavy usage of Ed25519 keys.



Would there be motivation to change the rules to allow Ed25519 certs, or is there some reason I'm missing as to why they're not allowed?



Thanks,

Q Misell

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