Current State Of Transport Layer Security (TLS) Post-Quantum Cryptography
trustfour, Monday, May 27th, 2024
In May 2024, a comprehensive Transport Layer Security (TLS) scan conducted by TrustFour across the Fortune 1000 externally facing websites and domains. Across the entire Fortune 1000 domains, only 177 supported the Post Quantum key encapsulation hybrid cipher suite X25519_Kyber76. ​​
The result isn't surprising given that post quantum support has not yet been incorporated in a IETF standard for TLS and a draft IETF Hybrid Key Exchange in TLS V1.3 draft standard is the only one we found supported.
It should also be noted that, no other post quantum algorithm was supported. To validate this, TrustFour scanned support for the following ten (10) post quantum algorithms: kyber512, p256_kyber512, x25519_kyber512, p256_kyber768, x25519_kyber768, kyber768, p384_kyber768, x448_kyber768, kyber1024, and p521_kyber1024.
TrustFour is planning to publish this report every quarter and will include progress charts at the end of Q3 2024. To see if your site is post quantum configured at our free TLS Compliance checking site.