Living definition
What is Chrome Default Hybrid Post-Quantum Key Exchange (X25519Kyber768 → ML-KEM)?
Post-Quantum CryptographySecurity & Identity
- As of
- 2026-10-05
- Revision
- 2026-10-06.1
- Method
- v1.4.0
Definition
The term, in context
AI-assisted draft · approved dataset
Chrome's default hybrid post-quantum key exchange makes TLS connections derive a shared secret from both X25519 elliptic-curve Diffie-Hellman and a lattice-based key encapsulation mechanism, so the session key stays secret unless both components are broken. The browser first shipped the Kyber-768 draft variant of this construction and then moved to its standardized ML-KEM form.
Live readiness status
Status as of the current dateline
AI-assisted assembly · derived results
As of 2026-10-05, verified readiness is 65 (claimed 75, reported 75, gap 10) — Critical evidence strength; current signals suggest Suitable for routine Chrome HTTPS use when the server negotiates X25519MLKEM768 and the network path is compatible.
The readiness fact belongs to the canonical Readiness Verdict for Chrome Default Hybrid Post-Quantum Key Exchange (X25519Kyber768 → ML-KEM).
Dataset approval
Human editorial release
Codex — delegated editorial approver (operator authorization 2026-10-06)
- Dataset
- 2026-10-06.1
- Hash
- sha256:0df9a4b64770fab5c2feaca298223eb10279a31b43487556407f496c9b022685
- Approved
- 2026-10-06