Quantum-Secure Messaging Protocol QMSG Approved by IETF: End-to-End Encryption Upgraded from Mathematical to Physical Security

Quantum-Secure Messaging Protocol QMSG Approved by IETF: End-to-End Encryption Upgraded from Mathematical to Physical Security

The Internet Engineering Task Force (IETF) formally approved the quantum-secure instant messaging protocol QMSG as an international standard (RFC 9577) on December 25. This is the first standardized protocol to integrate quantum key distribution into the application layer of instant messaging.

QMSG operates in two phases. First, communicating parties exchange quantum random keys via a QKD network, with security guaranteed by physics: the no-cloning theorem means any eavesdropping leaves detectable traces. Second, parties use these quantum keys to add a second encryption layer to classical end-to-end encryption, creating a dual-layer security architecture.

The protocol was primarily driven by Pan Jianwei's team at the University of Science and Technology of China and the University of Geneva's quantum cryptography group. Pan Jianwei stated: Traditional encryption security depends on computational complexity of mathematical problems. If quantum computers can break these problems, all classical encryption becomes naked. QMSG fundamentally solves this with physical laws rather than mathematical assumptions.

China has built approximately 12,000 kilometers of quantum communication backbone networks covering over 20 major cities. The EU's EuroQCI infrastructure is advancing rapidly, planned to cover all 27 member states by end of 2029.

However, QMSG adoption faces infrastructure bottlenecks. QKD requires dedicated fiber links or satellite relays, currently only covering backbone networks between major cities. Last-mile access still relies on trusted relay nodes, which partially undermines end-to-end quantum security guarantees.