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

Dawen Xu; Rangding Wang

doi:10.1117/1.JEI.24.3.033028

24 June 2015 Context adaptive binary arithmetic coding-based data hiding in partially encrypted H.264/AVC videos

Dawen Xu, Rangding Wang

Author Affiliations +

Funded by: National Natural Science Foundation of China, Natural Science Foundation of China, Zhejiang Provincial Natural Science Foundation of China, Natural Science Foundation of Ningbo, Ningbo Natural Science Foundation, Public Welfare Technology Application Research Project of Zhejiang Province

Journal of Electronic Imaging, Vol. 24, Issue 3, 033028 (June 2015). https://doi.org/10.1117/1.JEI.24.3.033028

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.

Citation Download Citation

Dawen Xu and Rangding Wang "Context adaptive binary arithmetic coding-based data hiding in partially encrypted H.264/AVC videos," Journal of Electronic Imaging 24(3), 033028 (24 June 2015). https://doi.org/10.1117/1.JEI.24.3.033028

Published: 24 June 2015

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