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 To unsubscribe send an email to tls-le...@ietf.org
