Is Chrome Quantum Safe?
Yes. Google Chrome has supported hybrid post-quantum TLS since version 124 (April 2024), using X25519Kyber768 for key exchange.
Key Takeaway: Chrome is considered quantum safe. Chrome 124 used draft Kyber-768 (X25519Kyber768Draft00); standardized ML-KEM-768 (FIPS 203, X25519MLKEM768) shipped in Chrome 131 (Nov 2024).
- Modality
- Communication Platform
- Vulnerability
- TLS connections to servers that do not support hybrid PQC still use classical-only key exchange.
- NIST status
- Chrome 124 used draft Kyber-768 (X25519Kyber768Draft00); standardized ML-KEM-768 (FIPS 203, X25519MLKEM768) shipped in Chrome 131 (Nov 2024).
- Replaced by
- N/A — Chrome has already deployed hybrid PQC for TLS
- Deprecation
- Already quantum safe for supported connections
Technical Analysis
Google Chrome supports hybrid post-quantum TLS. Chrome 124 (April 2024) shipped X25519Kyber768Draft00 — a pre-standard hybrid combining classical X25519 with the draft Kyber-768. Chrome 131 (November 2024) switched to the standardized X25519MLKEM768 hybrid using NIST ML-KEM-768 (FIPS 203). This protects HTTPS connections to servers that support the hybrid key exchange across Chrome on all platforms. The hybrid approach ensures that even if ML-KEM is later found to have weaknesses, the classical X25519 component maintains security.
At a glance
| Full Name | Google Chrome Browser |
| Category | communication |
| Quantum Vulnerability | TLS connections to servers that do not support hybrid PQC still use classical-only key exchange. |
| NIST Status | Chrome 124 used draft Kyber-768 (X25519Kyber768Draft00); standardized ML-KEM-768 (FIPS 203, X25519MLKEM768) shipped in Chrome 131 (Nov 2024). |
| Deprecation Timeline | Already quantum safe for supported connections |
| Replaced By | N/A — Chrome has already deployed hybrid PQC for TLS |
Deployment Guidance
Ensure Chrome is updated to version 131 or later for standardized ML-KEM-768. Verify server-side PQC support using QScout.
How Qtonic Quantum Can Help
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