I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written primarily for the benefit of the security area directors.  Document editors and WG chairs should treat these comments just like any other last call comments.

This document is ready: there are no security issues that have not been addressed in reviews of earlier documents (e.g., RFCs 8443, 8225, and 8224).