x25519mlkem1024

X25519MLKEM1024 is a higher-security post-quantum hybrid combining X25519 with ML-KEM-1024 (Kyber-1024). ML-KEM-1024 provides NIST security level 5, equivalent to approximately AES-256, offering maximum quantum resistance among standardized algorithms. This variant is intended for applications requiring the highest security margins against future quantum computers, such as long-term secrets or classified communications. The larger key size results in performance trade-offs: ML-KEM-1024 keys are approximately 30% larger than ML-KEM-768, and operations are slightly slower. Browser support is more limited than ML-KEM-768 variants, as the industry consensus favors ML-KEM-768 as the standard security level for most applications.