A new Request for Comments is now available in online RFC libraries.
RFC 9690
Title: Use of the RSA-KEM Algorithm
in the Cryptographic Message Syntax (CMS)
Author: R. Housley,
S. Turner
Status: Standards Track
Stream: IETF
Date: February 2025
Mailbox: [email protected],
[email protected]
Pages: 30
Obsoletes: RFC 5990
I-D Tag: draft-ietf-lamps-rfc5990bis-10.txt
URL: https://www.rfc-editor.org/info/rfc9690
DOI: 10.17487/RFC9690
The RSA Key Encapsulation Mechanism (RSA-KEM) algorithm is a one-pass
(store-and-forward) cryptographic mechanism for an originator to
securely send keying material to a recipient using the recipient's
RSA public key. The RSA-KEM algorithm is specified in Clause 11.5 of
ISO/IEC: 18033-2:2006. This document specifies the conventions for
using the RSA-KEM algorithm as a standalone KEM algorithm and the
conventions for using the RSA-KEM algorithm with the Cryptographic
Message Syntax (CMS) using KEMRecipientInfo as specified in RFC 9629.
This document obsoletes RFC 5990.
This document is a product of the Limited Additional Mechanisms for PKIX and
SMIME Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
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