Smart Selective Encryption of H.264/AVC Videos using Confidentiality Metrics

William Puech 1 Loïc Dubois 1 Jacques Blanc Talon 2
1 ICAR - Image & Interaction
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : In the field of video protection, selective encryption (SE) is a scheme which ensures the visual security of a video by encrypting only a small part of the data. This paper presents a new SE algorithm for H.264/AVC videos in CAVLC mode. This algorithm controls the amount of encrypted alternative coefficients (AC) of the integer transform in the entropic encoder. Two visual quality measures, the peak signal-to-noise ratio (PSNR) and the structural similarity (SSIM), are used to measure the visual confidentiality level of each video frame and to control the amount of encrypted AC. Moreover, a new psychovisual metric to measure the flickering is introduced, the so-called TSSIM. This method can be applied on intra and inter frame video sequences. Several experimental results show the efficiency of the proposed method.
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William Puech, Loïc Dubois, Jacques Blanc Talon. Smart Selective Encryption of H.264/AVC Videos using Confidentiality Metrics. Annals of Telecommunications - annales des télécommunications, Springer, 2014, 69 (11), pp.569-576. ⟨10.1007/s12243-013-0413-4⟩. ⟨lirmm-01237036⟩

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