Secure transmission method based on complication of air interface signal feature

Abstract

The invention discloses a secure transmission method based on complication of an air interface signal feature. The method comprises air interface signal feature scrambling of a sending end and air interface signal feature descrambling of a receiving end, wherein the air interface signal feature scrambling of the sending end comprises the steps of firstly using a random sequence to perform phase scrambling on a modulated signal, and then using the random sequence to perform amplitude dynamic adjustment on the signal that is subjected to the phase scrambling to acquire an amplitude scrambled signal; the air interface signal feature descrambling of the receiving end comprises the steps of firstly using the random sequence which is the same as that of the sending end to perform amplitude recovery on a channel equalized signal, and at last performing phase descrambling on the amplitude scrambled signal to acquire the signal feature before phase scrambling. According to the method provided by the invention the signal feature of the wireless transmission system can be efficiently hidden without extending the signal bandwidth and without causing performance loss of the communication system, and the security of the mobile communication system is enhanced from the level of the physical layer.

Description

technical field [0001] The invention relates to a secure transmission method based on complication of air interface signal features. Background technique [0002] In the existing wireless communication system, wireless signals are transmitted in an open environment, and the radio signals are not encrypted and protected, which may easily cause leakage of sensitive plaintext information. The security of 2G / 3G / 4G wireless communication systems depends on the long-term root key K, which cannot guarantee forward security. Once the root key is leaked, all encrypted information sent before can be easily obtained. With the emergence of capabilities, the security of traditional key storage and distribution will face greater hidden dangers. Today, as wireless communication security is getting more and more attention, it has become a necessity to add security mechanisms to every layer in the network protocol stack. Physical layer security solves the information security problem in th...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a secure transmission method based on complex air interface signal characteristics, which can solve the problems of single solidification and insecurity in the physical layer signal processing process in the existing wireless transmission system, and improve the existing The complex processing method of air interface signal characteristics has problems such as low modulation concealment performance, influence on communication performance indicators, and impracticality.

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