[TLS] FW: New Version Notification for draft-wang-tls-hybrid-ecdh-scloud-01.txt

Wang Guilin <Wang.Guilin@huawei.com> Wed, 18 February 2026 14:53 UTC

From: Wang Guilin <Wang.Guilin@huawei.com>
To: "tls-chairs@ietf.org" <tls-chairs@ietf.org>, "tls@ietf.org" <tls@ietf.org>
Thread-Topic: [TLS] FW: New Version Notification for draft-wang-tls-hybrid-ecdh-scloud-01.txt
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Date: Wed, 18 Feb 2026 14:53:26 +0000
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CC: Anyu Wang <anyuwang@tsinghua.edu.cn>, Wang Guilin <Wang.Guilin@huawei.com>
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Subject: [TLS] FW: New Version Notification for draft-wang-tls-hybrid-ecdh-scloud-01.txt
Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/zDGZ66-aXexj3ot6T9J8Tf5IqcQ>

Dear all, 

We have submitted a new draft on hybrid key exchange in TLS. 

This draft specifies how to instantiate hybrid key exchange in TLS 1.3 using ECDHE and SCloud+, a PQ KEM proposed in 2024. SCloud+ is based on the unstructured LWE problem with improved performance. The absence of algebraic structure in such KEMs presumes a higher level of security than for algorithms based on structured lattices. So, the hybrid of ECDHE and SCloud+ may serve as a conservative option for high-security applications using TLS 1.3.  

Your comments and review are welcome!

Thanks, 

Guilin and Anyu

-----Original Message-----
From: internet-drafts@ietf.org <internet-drafts@ietf.org> 
Sent: Monday, 16 February 2026 9:39 pm
To: Anyu Wang <anyuwang@tsinghua.edu.cn>; Wang Guilin <Wang.Guilin@huawei.com>; Wang Guilin <Wang.Guilin@huawei.com>
Subject: New Version Notification for draft-wang-tls-hybrid-ecdh-scloud-01.txt

A new version of Internet-Draft draft-wang-tls-hybrid-ecdh-scloud-01.txt has been successfully submitted by Guilin Wang and posted to the IETF repository.

Name:     draft-wang-tls-hybrid-ecdh-scloud
Revision: 01
Title:    Post-quantum Hybrid ECDHE-SCloud+ Key Exchange for TLS 1.3
Date:     2026-02-16
Group:    Individual Submission
Pages:    12
URL:      https://www.ietf.org/archive/id/draft-wang-tls-hybrid-ecdh-scloud-01.txt
Status:   https://datatracker.ietf.org/doc/draft-wang-tls-hybrid-ecdh-scloud/
HTML:     https://www.ietf.org/archive/id/draft-wang-tls-hybrid-ecdh-scloud-01.html
HTMLized: https://datatracker.ietf.org/doc/html/draft-wang-tls-hybrid-ecdh-scloud
Diff:     https://author-tools.ietf.org/iddiff?url2=draft-wang-tls-hybrid-ecdh-scloud-01

Abstract:

   This draft specifies how to enable hybrid key exchange with ECDHE and
   SCloud+ in Transport Layer Security protocol version 1.3 (TLS 1.3) to
   mitigate quantum threats.  SCloud+ is an unstructured lattice based
   KEM (key encapsulation mechanism) with post-quantum security.  This
   draft follows the post-quantum hybrid key exchange framework
   specified by [TLS.Hybrid], by concatenating the public keys and
   ciphertexts of ECDHE and SCloud+. Three concrete hybrid key exchange
   schemes are specified in this draft, which are X25519SCloud+128,
   SecP256r1SCloud+192 and SecP384r1SCloud+256.

   [EDNOTE: ... ]



The IETF Secretariat

[TLS] FW: New Version Notification for draft-wang… Wang Guilin