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RFC 10042 specifies post-quantum ML-KEM hybrid key exchange for SSH
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RFC 10042 defines Post-Quantum Traditional hybrid key exchange methods for the SSH transport layer protocol by combining the quantum-resistant Module-Lattice-Based Key-Encapsulation Mechanism with traditional Elliptic-Curve Diffie-Hellman schemes.
This specification provides a concrete mechanism to protect SSH sessions against harvest now, decrypt later attacks by adversaries with future quantum computers. Implementing the hybrid approach ensures the connection remains at least as secure as traditional ECDH even if the post-quantum component is compromised.
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The document defines hybrid key exchange methods that combine ML-KEM with traditional ECDH for the SSH transport layer protocol.
The hybrid approach ensures the resulting key exchange is always at least as secure as the most secure individual scheme executed within it.
RFC 10042 is published as an Informational document rather than an Internet Standards Track specification.
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