Abstract
In order to solve the problem of the secret transmission of important or low speed data on the satellite, the SCZS (satellite communication zero steganography) algorithm for covert communication is proposed with the satellite communication characters of mass data and high security. Firstly, the payload data was encrypted by the AES algorithm. Secondly, the multi-dimension features of the carrier image were extracted from the spatial or frequency domain. Thirdly, the relationship between the features and the payload information was established. The imperceptibility analysis showed that the algorithm brings no distortion to the cover image because there was no change to the cover image and it has a perfect invisibility. The robustness test showed that the proposed SCZS algorithm workd well in the tests of salt and pepper noise attack, the speckle noise and the low pass filtering attack, which achieves 95 % data recovery rate. Therefore the proposed SCZS algorithm has strong applicability for secret transmission of important or low speed data on the satellite.
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