10 Aib 2024 · We thank the community for their support in trying to improve the security of HQC for side channel attacks and for improvements on hardware implementations of HQC.

The table below provides the sizes and performances of HQC. Sizes are given for the keypair (ek, dk), ciphertext c and shared key K. Performances are reported for an implementation using …

11 Márta 2025 · While Kyber-512 has a public key of 800 bytes, HQC128 uses a 2,249-byte public key. With the private key, Kyber512 has a key size of 1,632 bytes, and Bike128 has a public key …

30 Aib 2023 · Algorithm type: Key encapsulation mechanism. Main cryptographic assumption: Syndrome decoding of structure codes (Hamming Quasi-Cyclic).

NIST has chosen a new algorithm for post-quantum encryption called HQC, which will serve as a backup for ML-KEM (Kyber), the main algorithm for general encryption. HQC is based on …

The report summarizes each of the candidate algorithms and identifies those selected for standardization. The only key-establishment algorithm that will be standardized is HQC, and …

17 Márta 2025 · Classic McEliece is usually seen as the conservative choice for security; however, its large public-key size made NIST skeptical about whether it will ever see widespread usage.

4 Samh 2023 · While Kyber-512 has a public key of 800 bytes, HQC128 uses a 2,249-byte public key. With the private key, Kyber512 has a key size of 1,632 bytes, and Bike128 has a public key …

19 Márta 2025 · HQC offers a key size of ~3,000 bits, significantly smaller than McEliece’s ~1MB keys. It enables fast decryption while maintaining zero decryption failures in rank-metric …

12 Márta 2025 · So, organizations planning their PQC migration now will need to wait at least two years for a standardized version of HQC. Meanwhile, ML-KEM is already standardized and …