PQ-hardened key exchange performance benchmarks

[Tristan-Stoltz-ERC]

All clusters use post-quantum hardened cryptography. Add benchmarks measuring:

• ML-KEM-768 key generation time
• Encapsulation/decapsulation throughput
• ML-DSA-65 signing/verification speed
• Comparison with classical alternatives

This data is needed for the security audit documentation.

References

• crates/feldman-dkg/ for the DKG implementation
• Current PQ hardening covers all cluster communication paths

Suggested approach

Use criterion benchmarks with statistical analysis. Include both single-operation latency and throughput measurements across different payload sizes.