0.75 Gbit/s key distribution with mode-shift keying chaos synchronization

Information encryption is one of the core technologies of cyberspace security. The algorithm encryption has a risk of exhaustive attack due to the algorithm determinacy. Quantum key distribution based on quantum no-cloning principle promises unconditional security and still has challenges: key rate is limited by the single-photon detector and distribution channel is hardly compatible with optical fiber communication link. For one of the classical physical methods, the rate of random-keying chaotic synchronization method is mainly limited by the tens of nanoseconds synchronization recovery time. Shortening the recovery time may pay a way for Gbit/s physical key distribution.