Abstract
With the development of Internet and communication technology, the security threats of mobile communication network emerge one after another. Using sound wave and covert channel, it’s possible to find a covert security communication method based on high frequency sound waves at short distance. Initially, we use technologies such as channel coding and decoding, message authentication, signal synchronization, signal modulation and demodulation. Then we designed a multi-thread based sound wave acquisition and playback scheme. We also constructed a one-way P2P high frequency acoustic wave covert channel with good basic performance. On this basis, we introduced the error control mechanism and other related technologies and designed a two-way alternating information sharing scheme. Finally, the information security application of high frequency acoustic wave covert channel is realized on mobile devices.
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