Secret communication method and device

Abstract

The embodiment of the invention relates to the technical field of communication, in particular to a secret communication method and device, which are used for more accurately constructing a driving-response system conforming to the reality. The method comprises the steps that a response system receives a superposed signal sent by a driving system, wherein the superposed signal is obtained by modulating the driving system through a random parameter fractional order nonlinear method, and the superposed signal comprises a chaotic signal and a useful signal; and the response system demodulates thesuperposed signal by using a synchronous controller and a parameter identification rule to obtain the useful signal, wherein the synchronous controller and the parameter identification rule are determined in the process of realizing synchronous confirmation of the driving system and the response system.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a secure communication method and device. Background technique [0002] Confidential communication refers to a communication method in which the two parties to the communication change the form of information according to the agreed method to hide its true content in order to prevent information from being stolen. During the communication process, the plaintext generated by the sender converts the plaintext into ciphertext through the channel and transmits it through the channel. When the legitimate receiver normally receives the ciphertext, it decrypts it according to the key decryption algorithm to obtain the plaintext. The communication process is complete. If the channel is an unsafe channel, it may be intercepted by lawbreakers, because the information intercepted by illegal receivers is some random and meaningless symbols, but if the interceptor knows the enc...

AI Technical Summary

Problems solved by technology

The existing technology generally uses fractional nonlinear systems with certain parameters, but the situation in the actual communication process is very complicated. It is polluted by noise, time delay, and the difference between the theoretical and actual values ​​of equipment will inevitably cause signal changes.

Images