RFC 9909 on Internet X.509 Public Key Infrastructure -- Algorithm Identifiers for the Stateless Hash-Based Digital Signature Algorithm (SLH-DSA)

A new Request for Comments is now available in online RFC libraries.

        RFC 9909

        Title:      Internet X.509 Public Key Infrastructure 
                    -- Algorithm Identifiers for the Stateless 
                    Hash-Based Digital Signature Algorithm (SLH-DSA) 
        Author:     K. Bashiri,
                    S. Fluhrer,
                    S. Gazdag,
                    D. Van Geest,
                    S. Kousidis
        Status:     Standards Track
        Stream:     IETF
        Date:       December 2025
        Mailbox:    kaveh.bashiri.ietf@gmail.com,
                    sfluhrer@cisco.com,
                    ietf@gazdag.de,
                    daniel.vangeest@cryptonext-security.com,
                    kousidis.ietf@gmail.com
        Pages:      38
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-lamps-x509-slhdsa-09.txt

        URL:        https://www.rfc-editor.org/info/rfc9909

        DOI:        10.17487/RFC9909

Digital signatures are used within the X.509 Public Key
Infrastructure, such as X.509 certificates and Certificate Revocation
Lists (CRLs), as well as to sign messages.  This document specifies
the conventions for using the Stateless Hash-Based Digital Signature
Algorithm (SLH-DSA) in the X.509 Public Key Infrastructure.  The
conventions for the associated signatures, subject public keys, and
private keys are also specified.

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 
standardization state and status of this protocol.  Distribution of this 
memo is unlimited.

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