Secure key distribution system and secure key distribution method based on chaotic synchronization common channel feature

Abstract

The invention belongs to the technical field of key distribution in secure communications, relates to a secure and high-speed key distribution scheme, and especially provides a secure and high-speed key distribution system and a method thereof based on a chaotic synchronization common channel feature. The system comprises a wideband random light source, a main fiber coupler, a common channel, an ultra-short pulse mode-locked laser, an Alice communicating party, and a Bob communicating party, wherein the Alice communicating party comprises a first optical feedback chaotic semiconductor laser, afirst fiber coupler, a first optical switch, a first privacy key module, a first register, and a first key filter; and the Bob communicating party comprises a second optical feedback chaotic semiconductor laser, a second fiber coupler, a second optical switch, a second privacy key module, a second register, and a second key filter. The invention is reasonable in structure, clever in design, effectively guarantees the key distribution security, and adequately uses the bandwidth advantage of a chaotic optical signal, which greatly improves the key distribution rate, and is appropriate for secure communication.

Description

technical field [0001] The invention belongs to the technical field of key distribution in secure communication, and relates to a safe and high-speed key distribution scheme, in particular to a key security distribution system and method based on the characteristics of a chaotic synchronous public channel. Background technique [0002] Secure communication is an important condition for national security and social stability. At present, the research hotspots of modern information security technology mainly focus on information encryption technology. The "one-time pad" proposed by Shannon is an unbreakable encryption scheme. The scheme states that if the key used to encrypt the plaintext is not shorter than the plaintext, is random enough, and is used only once, then the communication is absolutely secure. In order to realize this absolutely secure confidential communication, it is necessary to generate a large number of random keys and distribute them secretly to legitimat...

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problems of poor security and low key distribution rate in the existing key distribution technology,

Images