The invention relates to a time hidden channel robust construction method based on active packet loss, and belongs to the technical field of mobile data security. The relying system comprises a hiddenmessage embedding module and a hidden message extracting module. The hidden message embedding module comprises a message grouping unit, a code word calculation unit and a code word-symbol conversionunit, a discarding data packet sequence number calculation unit and a data packet transmission control unit; the hidden message extraction module comprises a data packet sequence number monitoring unit, a symbol extraction unit and a symbol-code word conversion unit, a code word identification unit and a hidden message combination unit; the hidden channel robust construction method comprises the working processes of a hidden message embedding module and a hidden message extraction module. The hidden message extraction module can only extract the data embedded by the hidden message embedding module. According to the construction method, hidden message embedding is achieved, extra transmission synchronization is not needed, and data disorder cannot be caused; the embedding process has anti-detection capability; and the influence of network noise in the transmission process is reduced.

Time hidden channel robust construction method based on active packet loss

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Time hidden channel robust construction method based on active packet loss