Signal Messenger Introduces PQXDH Quantum-Resistant Encryption
Sep 20, 2023
Encryption / Privacy
Encrypted messaging app Signal has announced an update to the Signal Protocol to add support for quantum resistance by upgrading the Extended Triple Diffie-Hellman ( X3DH ) specification to Post-Quantum Extended Diffie-Hellman ( PQXDH ). "With this upgrade, we are adding a layer of protection against the threat of a quantum computer being built in the future that is powerful enough to break current encryption standards," Signal's Ehren Kret said . The development comes weeks after Google added support for quantum-resistant encryption algorithms in its Chrome web browser and announced a quantum-resilient FIDO2 security key implementation as part of its OpenSK security keys initiative last month. The Signal Protocol is a set of cryptographic specifications that provides end-to-end encryption (E2EE) for private text and voice communications. It's used in various messaging apps like WhatsApp and Google's encrypted RCS messages for Android. Whi...