Extended Selective Encryption of H.264/AVC (CABAC) and HEVC encoded video streams

Abstract : This paper proposes an extended Selective Encryption (SE) method for both H.264/AVC (CABAC) and HEVC streams. Namely, this work addresses the main security issue that SE is facing : the content protection, related to the amount of information leakage through a protected video. Our contribution is the improvement of the visual distortion induced by SE approaches. If previous works on both H.264/AVC (CABAC) and HEVC limit encryption to bins treated by one specific mode of CABAC: its by-pass mode - which has the advantage of preserving the overall bitrate -, we propose here to also rely on the encryption of the more widely used mode of CABAC: its regular mode. This allows to encrypt a major codeword for video reconstruction : the prediction modes for Intra blocks/units. Disturbing their statistics may cause bitrate overhead, which is the trade-off for improving the content security level of the SE approach. A comprehensive study of this compromise between the improvement of the scrambling efficiency and the undesirable aftereffects is proposed in this paper, and a specific security analysis of the proposed CABAC regular mode encryption is conducted.
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Contributor : Frédéric Dufaux <>
Submitted on : Friday, January 13, 2017 - 12:43:42 AM
Last modification on : Wednesday, February 20, 2019 - 2:38:53 PM



Benoit Boyadjis, Cyril Bergeron, Beatrice Pesquet-Popescu, Frederic Dufaux. Extended Selective Encryption of H.264/AVC (CABAC) and HEVC encoded video streams. IEEE Transactions on Circuits and Systems for Video Technology, Institute of Electrical and Electronics Engineers, 2017, 27 (4), pp.892-906. ⟨10.1109/TCSVT.2015.2511879⟩. ⟨hal-01433748⟩



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