HQC

cryptography

Stands for: Hamming Quasi-Cyclic

A code-based post-quantum key-encapsulation algorithm selected by NIST as a backup.

Hamming Quasi-Cyclic is a code-based key-encapsulation mechanism NIST selected in 2025 as a backup to the lattice-based ML-KEM, so that post-quantum security does not rest on a single mathematical assumption.

Also known as: hqc

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