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Context adaptive binary arithmetic coding-based data hiding in partially encrypted H.264/AVC videos

[+] Author Affiliations
Dawen Xu

Ningbo University of Technology, School of Electronics and Information Engineering, 89 Cuibai Road, Ningbo, Zhejiang 315016, China

Rangding Wang

Ningbo University, CKC Software Laboratory, Ningbo 315211, China

J. Electron. Imaging. 24(3), 033028 (Jun 24, 2015). doi:10.1117/1.JEI.24.3.033028
History: Received January 14, 2015; Accepted June 2, 2015
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Abstract.  A scheme of data hiding directly in a partially encrypted version of H.264/AVC videos is proposed which includes three parts, i.e., selective encryption, data embedding and data extraction. Selective encryption is performed on context adaptive binary arithmetic coding (CABAC) bin-strings via stream ciphers. By careful selection of CABAC entropy coder syntax elements for selective encryption, the encrypted bitstream is format-compliant and has exactly the same bit rate. Then a data-hider embeds the additional data into partially encrypted H.264/AVC videos using a CABAC bin-string substitution technique without accessing the plaintext of the video content. Since bin-string substitution is carried out on those residual coefficients with approximately the same magnitude, the quality of the decrypted video is satisfactory. Video file size is strictly preserved even after data embedding. In order to adapt to different application scenarios, data extraction can be done either in the encrypted domain or in the decrypted domain. Experimental results have demonstrated the feasibility and efficiency of the proposed scheme.

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Topics

Data hiding ; Video

Citation

Dawen Xu and Rangding Wang
"Context adaptive binary arithmetic coding-based data hiding in partially encrypted H.264/AVC videos", J. Electron. Imaging. 24(3), 033028 (Jun 24, 2015). ; http://dx.doi.org/10.1117/1.JEI.24.3.033028


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