Research on underwater information covert transmission technology

In the process of ocean development, marine information is bound to contain important information for companies or institutions. How to transmit important information security covertly to the remote shore center without being intercepted by eavesdroppers becomes the key problem of underwater acoustic communication. William Roberts [1] studied the application of DSSS signals in covert communication, but the method of covert communication was achieved at the expense of communication rates. Han Xiao [2] proposed a bionic underwater acoustic communication technology in 2013, which selects dolphin whistles signals as synchronous and Pattern codes and the carries information were represented by the time delay difference between adjacent signals. Then in 2013, Liu Songzuo[3] proposed to use dolphin calls as information carriers and modulate the information on the adjacent between dolphin click signals. All of the above research is for the purpose of not being intercepted. The key point of this paper is not whether the underwater acoustic signal is intercepted, but to hide and transmit safely important information.