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 details how to produce RSA/SHA-512 and RSA/SHA-256 DNSKEY and RRSIG RRs in DNS. I find the document more than adequately discusses and addresses security considerations. I do note that the document appears to place an additional recommendation upon implementors of DNSSEC (in Section 5.1) yet does not "update" any DNSSEC specification. It may be appropriate for this I-D to "update" (upon approval/publication) DNSSEC specifications. Regards, Kurt