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. The summary of the review is Ready. As noted in the Document History, this switches SHA512 to SHA1 as the MAC checksum in PKCS#12 objects to interop. with Keychain Access on macOS.