Hello all, I think it’s premature to say that 3GPP intends to use SLH-DSA. The 3GPP security group (SA3) will start its PQ migration study at its next meeting. As such no discussions about which algorithms are required/preferred/desired has happened at this stage.
Details of the study parameters/scope can be found here for the curious: https://www.3gpp.org/ftp/tsg_sa/TSG_SA/TSGS_108_Prague_2025-06/Docs/SP-250858.zip Regards, Matt The Standards Person NCSC Telecoms Security Consultant From: tirumal reddy <kond...@gmail.com> Sent: 16 July 2025 12:46 To: Sean Turner <s...@sn3rd.com> Cc: TLS List <tls@ietf.org> Subject: [TLS] Re: Second WG Adoption Call for Use of SLH-DSA in TLS 1.3 I support adoption of the draft. SLH-DSA is intended to be leveraged in 3GPP deployments, particularly for long-lived connections. While it increases the size of the TLS 1.3 handshake, the impact on connection performance is minimal in the context of long-lived connections with large data transfers. Cheers, -Tiru On Tue, 15 Jul 2025 at 03:37, Sean Turner <s...@sn3rd.com<mailto:s...@sn3rd.com>> wrote: We kicked off an adoption call for Use of SLH-DSA in TLS 1.3; see [0]. We called consensus [1], and that decision was appealed. We have reviewed the messages and agree that we need to redo the adoption call to get more input. What appears to be the most common concern, which we will take from Panos' email, is that "SLH-DSA sigs are too large and slow for general use in TLS 1.3 applications". One way to address this concern is to add an applicablity statement to address this point. We would like to propose that this (or something close to this) be added to the I-D: Applications that use SLH-DSA need to be aware that the signatures sizes are large; the signature sizes for the cipher suites specified herein range from 7,856 to 49,856 bytes. Likewise, the cipher suites are considered slow. While these costs might be amoritized over the cost of a long lived connection, the cipher suites specified herein are not considered for general use in TLS 1.3. With this addition in mind, we would like to start another WG adoption call for draft-reddy-tls-slhdsa. If you support adoption with the above text (or something similar) and are willing to review and contribute text, please send a message to the list. If you do not support adoption of this draft with the above text (or something similar), please send a message to the list and indicate why. This call will close at 2359 UTC on 28 July 2025. Cheers, Deirdre, Joe, and Sean [0] https://mailarchive.ietf.org/arch/msg/tls/o4KnXjI-OpuHPcB33e8e78rACb0/ [1] https://mailarchive.ietf.org/arch/msg/tls/hhLtBBctK5em6l82m7rgM6_hefo/ [2] https://datatracker.ietf.org/doc/draft-reddy-tls-slhdsa/ _______________________________________________ TLS mailing list -- tls@ietf.org<mailto:tls@ietf.org> To unsubscribe send an email to tls-le...@ietf.org<mailto:tls-le...@ietf.org>
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