Physical layer secure transmission method capable of resisting any number of eavesdropping antennas

Abstract

The invention provides a physical layer secure transmission method capable of resisting any number of eavesdropping antennas. According to the invention, precoding processing is carried out to resisteavesdroppers with any number of antennas or eavesdroppers with any number of cooperative nodes; legal receivers and transmitters do not need to share any key information. No matter how many antennasare used by an eavesdropper for eavesdropping, the bit error rate of the received confidential information can be ensured to be 0.5, high-strength physical layer secure transmission is achieved, the advantages of low power consumption, low complexity and low interference are achieved, physical layer secure communication of eavesdroppers of any multi-antenna can be achieved without any additional artificial noise or cooperative interference, and extra burden of a network or redundant interference to other users cannot be increased. In the communication process of the method, Alice and Bob of two legal communication parties need a protection area with the radius of R to surround themselves respectively, so that an eavesdropper Eve cannot enter the protection area to eavesdrop, and it is guaranteed that channels of the Eve are independent of the Alice and the Bob.

Description

Technical field [0001] The present invention relates to the field of information security, in particular to a physical layer security transmission method that can resist any number of eavesdropping antennas. Background technique [0002] With the rapid development of 5G, Internet of Things and edge computing networks, a large number of new services and applications continue to emerge; various confidential and sensitive data in wireless networks are increasing in a massive manner, and the ensuing information security issues become more and more prominent , Security is gradually becoming a prerequisite for various business applications; compared with traditional wired networks, the broadcast and mobile characteristics of wireless mobile channels make the communications of legitimate users in the network vulnerable to eavesdropping and attacks by illegal users. In traditional wireless communication networks, cryptography-based encryption technologies are usually used at the network ...

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