Abstract
At present, the reversible information hiding algorithm in ciphertext domain preprocesses the data stream according to the length of the data stream, which leads to the low information entropy of the hidden data stream. According to the length of data stream and transmission protocol, the data stream information transmission model is established; The length of data stream and packet loss rate are taken as the basis to preprocess the data stream; The mapping matrix of data stream is generated, the bit string of data stream is determined, and the encryption and decryption algorithms of data stream are designed to realize reversible information hiding in ciphertext domain of data stream. From the two aspects of algorithm implementation and performance comparison, a comparative experiment of reversible information hiding algorithm in ciphertext domain is designed. Experimental results: the data frequency difference between the hidden data stream and the original data stream is 0.05. Compared with the two methods selected in this experiment, the information entropy of data stream is 1 and 0.5 higher respectively.
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