Information steganography method by taking compressed video as carrier

Abstract

The invention belongs to an information steganography method by taking compressed video as a carrier in the field of communication and information security. The method is characterized by using VLC encoding list in ISO / IEC 13818-2 standard in the realization process to preconstruct a group of increase / decrease pair value tree AST, selecting a certain leaf node of AST in information steganography to automatically guide the operation of an embedding method, thus the size of a compressed video file does not change remarkably before and after information embedding, and the transparency of a video steganography method is ensured. The information embedding and extraction operations of the method are performed completely in VLC domain, thereby avoiding decoding and recoding processes aiming at compressed video stream and meeting the real-time requirement of the video steganography method.

Description

technical field [0001] The invention belongs to the field of communication and information security, in particular to an information steganographic method in the VLC domain of MPEG-2 compressed video based on digital chaos system. Background technique [0002] Information steganography is an important branch of information hiding, and its purpose is to embed information secretly into a carrier and send it out safely without arousing the suspicion of a third party. Carriers that are usually selected as hidden can be various digital resources such as images, audio, video, documents, and software. Due to its large data size, high degree of redundancy, and wide application range, digital video has increasingly significant advantages as a steganographic carrier. In the video steganography method, the information sender can embed secret information into the public video, and only the designated legal receiver can extract the information according to the pre-agreed key, while othe...

AI Technical Summary

Problems solved by technology

Therefore, even if there is enough encoding space to embed the information, it will be very difficult to extract them

[0010] Then B.G.Mobasseri et al.'s algorithm "Watermarking of MPEG-2 Video in Compressed Domain Using VLC Mapping" in ACM Multimedia and SecurityWorkshop in 2005 used the value tree strategy to solve the limitation of the embedded space in VLC coding, but the value tree Constructed by the carrier video participating in the operation, that is, to investigate whether two pairs of VLC codes appear at the same time in the entire carrier video, the amount of calculation is large, and the operation efficiency of the steganographic algorithm is not high

At the same time, when the receiver extracts information in this algorithm, it needs to rely on the auxiliary extraction key with a large amount of data, which increases the burden on the key exchange link of the algorithm.

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