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即时通讯工具在带给公众信息交流便利的同时也成为信息泄露的重要源头。为了提高信息的安全性,采用以即时通讯工具为平台,利用其音频信道进行数字载波信号传送,将相对重要的信息调制到载波上进行发送,接收时再通过解调完成信息的接收。实验中调制和解调采用了二进制差分相移键控方式。将二进制码元信息调制后在腾讯QQ的音频信道中进行传输,接收端成功接收并解调还原出码元信息。通过实验证明了该方法的可行性。
Instant messaging tools have become an important source of information leakage while bringing convenience to public information exchange. In order to improve the security of information, we use the instant messaging platform as a platform to transmit the digital carrier signal by using its audio channel, modulate the relatively important information to the carrier for transmission, and then receive the information through demodulation. Experimental modulation and demodulation using binary differential phase shift keying. After modulating the binary symbol information, it is transmitted in the audio channel of Tencent QQ, and the receiving end successfully receives and demodulates and restores the symbol information. The feasibility of this method is proved by experiments.