HEVC selective encryption using transform skip signal and sign bin

A selective video encryption method based on the manipulation of transform skip signal and sign bin is proposed for the HEVC standard. The basic performance of the proposed selective video encryption method is evaluated in terms of perceptual inspection, outline detection and sketch attack using various classes of test video sequences. Preliminary results show that the proposed method provides quality degradation up to -0.22 in SSIM score when compared to the conventional method [5]. In addition, the edge difference ratio is greater than 0.73, which is closed to the perfect dissimilarity with respect to the original video. Functional comparison between the proposed method and the conventional selective encryption methods is then presented.