Dear all,

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

Compared to the previous versions of this draft, there are no substantial changes, mainly some correction on wording. I also agree with the security risk analysis in this document, it has been cited in 3GPP SA3.

Therefore, this version is ready for publication.


Thank you,
Tina