Post-Quantum Extended Diffie–Hellman

In cryptography, Post-Quantum Extended Diffie–Hellman (PQXDH) is a Kyber-based post-quantum key exchange method based on Diffie–Hellman key exchange. It has been a key part of the Signal Protocol, a popular end-to-end encryption protocol, since 2023.

Source: Wikipedia — Post-Quantum Extended Diffie–Hellman (CC BY-SA 4.0)