A method of secure information transmission based on photon noise aliasing multi-ary transformation

Abstract

The invention discloses an information security transmission method based on photon noise aliasing multi-ary transformation. Firstly, by sending synchronous information between the sending end and the receiving end to measure the characteristics of the optical fiber channel, the communication between the sending end and the receiving end is realized. The signal is synchronized, and then the sending end jointly modulates the binary signal and the random key signal into a high-order signal, and uses the characteristic that the high-order signal is sensitive to noise to hide the high-order signal in the photon noise to form a confidential signal; according to the optical fiber channel Reciprocity, the receiving end generates a key that is fully matched and synchronized with the sending end, produces a multi-ary threshold judgment signal, and finally compares the received secret signal and the multi-ary threshold judgment signal bit by bit to restore the correct received signal. The method is simple to implement, has good communication network compatibility, strong anti-eavesdropping ability, and low communication cost. It can be applied to information protection of backbone optical networks and dedicated optical networks, and has certain application potential in the field of optical network physical layer confidential communication.

Description

technical field [0001] The invention relates to the technical field of optical information security transmission, in particular to an information security transmission method based on photon noise aliasing multi-ary transformation. Background technique [0002] At present, in view of the characteristics of large information transmission capacity, long transmission distance, and wide distribution of optical fiber communication networks, a variety of eavesdropping methods have been developed internationally and are constantly being renovated. Coupling interception and fused tapered embedded coupling, etc., through these methods, a third party can make a part of the light leak from the conduction mode to the leakage mode without affecting normal communication, and restore the communication information through the captured leaked light. [0003] The security of the existing optical fiber communication network on the physical layer still relies on the traditional single electroni...

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