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 is rereview of this draft. In my previous review I listed some attacks, and all those attacks have been added to the security considerations section. I think the security considerations section is now good enough. I think this document is ready from the security point of view. -- kivinen at iki.fi