High-speed safe optical communication system capable of simultaneously transmitting secret key and ciphertext

Abstract

The invention discloses a high-speed safety optical communication system capable of simultaneously transmitting a secret key and a ciphertext, and belongs to the technical field of safety communication. According to the system, ASE noise with secret key information is hidden in ciphertext information light again, so that an eavesdropper is difficult to find effective information, and the security of the system is improved. The coarse and fine modulation of the signal is realized in the optical domain by adjusting the optical power, the quantum noise stream encryption with higher covering level number is realized, and the safety performance is improved. Transmission key information is hidden through a white light interference structure, the key information is hidden in ASE noise, and ciphertext information is modulated into a transmission ciphertext through optical domain thickness. And the channel for transmitting the secret key and the channel for transmitting the ciphertext are coupled to the same optical fiber through the optical multiplexing structure, so that the simultaneous transmission of the secret key and the ciphertext is realized, namely the secret key and the ciphertext are transmitted in the same optical fiber, the device structure is simple, and the cost of sharing the secret key by a receiving party and a transmitting party is greatly saved.

Description

technical field [0001] The invention belongs to the technical field of secure communication, and more specifically relates to a high-speed secure optical communication system for simultaneous interpretation of key ciphertext. Background technique [0002] With the explosive growth of optical communication-related applications, security issues in optical communication have become very important. The traditional secure communication technology based on the data link layer will be limited by the bottleneck of electronic processing, and it is difficult to resist the attacks of supercomputers and quantum computers. The security of traditional secure communication technology is challenged. The secure optical fiber communication technology based on the physical layer has become a research hotspot due to its advantages of hardware encryption and not being limited by electronic processing bottlenecks. Due to the physical characteristics of quantum, quantum key distribution can provi...

AI Technical Summary

Problems solved by technology

[0003] In terms of encryption, the traditional stream cipher is mapped from the codebook generated by the seed key, and the ciphertext and plaintext have the same modulation format. With the improvement of computing power and the development of quantum computers, its security is gradually weakened.

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