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Post-Quantum Cryptography in OpenPGP

Document Type Replaced Internet-Draft (openpgp WG)
Expired & archived
Authors Stavros Kousidis , Johannes Roth , Falko Strenzke , Aron Wussler
Last updated 2024-01-30
Replaced by draft-ietf-openpgp-pqc
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources issue tracker
source under revision control
Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-openpgp-pqc
Consensus boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document defines a post-quantum public-key algorithm extension for the OpenPGP protocol. 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, and SLH-DSA (formerly SPHINCS+) as a standalone public key signature scheme.


Stavros Kousidis
Johannes Roth
Falko Strenzke
Aron Wussler

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)