A Physical Layer Security Transmission Method Based on Noise Distribution

Abstract

The invention discloses a physical layer security transmission method based on noise distribution. By introducing a safety cooperation node SCN to distribute artificial noise signals to legal users, the safety cooperation node SCN combines the local secret key with the random secret key of the legal user and uses Hash The mapping method generates random interference noise signals, and simultaneously sends interference noise signals and artificial noise signals for confidential information transmission to legitimate users. Legitimate users can eliminate the influence of interference noise to obtain artificial noise signals required for safe transmission, and finally legal senders The artificial noise signal is superimposed on the transmitted confidential signal and sent to the legitimate receiving end. The invention ensures that the eavesdropper cannot eliminate the noise interference, thereby causing the eavesdropper to generate a bit error platform, thereby ensuring the safe transmission of the wireless system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a physical layer security transmission method based on noise distribution. Background technique [0002] Traditional wireless encryption methods mainly rely on upper-layer digital encryption algorithms, such as symmetric encryption algorithms AES, DES, etc., which can achieve fast and effective security encryption, but such algorithms have problems such as encryption key management and distribution difficulties. Digital key encryption algorithms are based on computational complexity theory to ensure the security of information transmission, and this security is based on the assumption of an ideal physical layer, that is, the physical layer can perform error-free transmission. [0003] With the advent of the era of big data, malicious eavesdroppers can also easily have powerful cluster computing capabilities. At this time, traditional key encryption meth...

AI Technical Summary

Problems solved by technology

At present, the research on artificial noise is mainly realized by transmitting artificial noise through the null space of the main channel, but it is difficult to ensure that the transmitter can accurately obtain the channel state information in the actual system. Interference affects normal communication

Some studies use the sending node and the destination node to cooperate to send artificial noise signals to interfere with potential untrusted relay nodes, but such studies have not fully considered the eavesdropper's eavesdropping ability. The direction of the eavesdropping antenna is aimed at the legitimate user. At this time, the artificial noise signal may not be able to effectively interfere with the eavesdropper

Images