2021-02-10 14:07:57 +01:00

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CRYSTALS-Kyber
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- **Algorithm type**: key encapsulation mechanism
- **Main cryptographic assumption**: module learning with errors (MLWE)
- **Scheme authors**: Roberto Avanzi, Joppe Bos, Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, John M. Schanck, Peter Schwabe, Gregor Seiler, Damien Stehle
- **Authors' website**: https://pq-crystals.org/kyber
- **Version**: NIST Round 3 submission
Implementation
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- **Source of implementation**: https://github.com/pq-crystals/kyber
- **Implementation version**: https://github.com/pq-crystals/kyber/commit/8e9308bd0f25fa698e4f37aba216249261f8b352
- **License**: Public domain
- **Constant-time**: Yes
- **Optimizations**: Portable C with AES, AVX2, POPCNT, SSE2 and SSSE3 instructions (if available at run-time)
Parameter sets
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| Parameter set | Security model | Claimed NIST security level | Public key size (bytes) | Secret key size (bytes) | Ciphertext size (bytes) | Shared secret size (bytes) |
|---------------|----------------|-----------------------------|-------------------------|-------------------------|-------------------------|----------------------------|
| Kyber512 | IND-CCA | 1 | 800 | 1632 | 768 | 32 |
| Kyber512-90s | IND-CCA | 1 | 800 | 1632 | 768 | 32 |
| Kyber768 | IND-CCA | 3 | 1184 | 2400 | 1088 | 32 |
| Kyber768-90s | IND-CCA | 3 | 1184 | 2400 | 1088 | 32 |
| Kyber1024 | IND-CCA | 5 | 1568 | 3168 | 1568 | 32 |
| Kyber1024-90s | IND-CCA | 5 | 1568 | 3168 | 1568 | 32 |