The IESG has approved the following document: - 'Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Message Specification' (draft-ietf-lamps-rfc5751-bis-11.txt) as Proposed Standard This document is the product of the Limited Additional Mechanisms for PKIX and SMIME Working Group. The IESG contact persons are Benjamin Kaduk and Eric Rescorla. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-lamps-rfc5751-bis/ Technical Summary: This document specifies the message handling for S/MIME 4.0. The changes since S/MIME 3.2 include required support for authenticated encryption, increased RSA key sizes, moving old cryptographic algorithms to historic status, and requiring support for AES-256 GCM, ChaCha200-Poly1305, SHA-512, ECDSA with P-256, EdDSA, and Ed25519. Working Group Summary: There is strong consensus for this document in the LAMPS WG. Document Quality: S/MIME has wide support, and several implementers have said that they will implement the new features in this document. Personnel: Russ Housley is the document shepherd. Eric Rescorla is the responsible area director.
