Post-quantum key exchange proved unsecurable in 1,700 queries

Five cryptographers proved that MQV-style lattice-based AKE protocols cannot achieve eCK security: two research schemes were broken in about 1,700 queries, and a hardened variant in 180 queries. Deployed systems based on the standardized NIST ML-KEM are not affected.

• Two research schemes broken in about 1,700 queries
• Hardened protocol variant broken in 180 queries
• Systems based on NIST standard ML-KEM not vulnerable