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RFC 9980: Post-Quantum Cryptography in OpenPGP

In plain English — editorial summary, not part of the RFC

This document defines a post-quantum public key algorithm extension for the OpenPGP protocol, extending RFC 9580. Given the generally assumed threat of a cryptographically relevant quantum computer, this extension provides a basis for long-term secure OpenPGP signatures and ciphertexts. Specifically, it defines composite public key encryption based on ML-KEM (formerly CRYSTALS-Kyber), composite public key signatures based on ML-DSA (formerly CRYSTALS-Dilithium), both in combination with Elliptic Curve Cryptography (ECC), and SLH-DSA (formerly SPHINCS+) as a standalone public key signature scheme.

Document record

Document ID
RFC9980
Published
June 2026
Authors
S. Kousidis; J. Roth; F. Strenzke; A. Wussler
Status
PROPOSED STANDARD
Stream
IETF
Area
sec
Pages
222
Also known as
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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

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