Accelerated key distribution method for endogenously secure optical communication by synchronized chaotic system based on fiber channel feature

Abstract

Security key is necessary for data encryption while transmitting amounts of confidential information. For existing strategies of key distribution, it is the primary challenge that the rate and distance limit, insufficient security, and difficulty of deployment. To solve these problems, we propose an accelerated key distribution method for endogenously secure optical communication by synchronized chaotic system based on BER feature of fiber channel. First, synchronized chaotic equation systems are innovatively realized by identical hardware equipment, chaotic equation, initial value, and micro interference. Then, the synchronization keeping with micro interference of proposed chaotic systems are obtained based on identical BER feature of fiber loop. Innovatively, all synchronous operation controls to proposed chaotic systems are guaranteed by deterministic rule of algorithm operation, and are not limited by amplifier or fiber length. Experimental result demonstrates that proposed chaotic systems are synchronized under long term operation. The key distribution rate (KDR) can reach a rate of 100Gbit/s at 100% key consistency rate. And, the KDR can be augmented by extending hardware resources of key distribution. Simulation is conducted to illustrate the security of chaotic systems by the bifurcation diagram, scatter plot diagram, and initial value sensitive phenomenon. NIST security test suite demonstrates that generated secret key sequences pass the test. Moreover, possible attacks are analysed for the security robustness of proposed scheme. The results illustrate proposed system is a reliable, secure and cost-effective solution for high-speed and long-haul key distribution.