Low‐latency selective encryption scheme for scalable extension of high‐efficiency video coding

Abstract

This article presents a selective encryption (SE) chaotic video stream cipher for the scalable extended high‐efficiency video coding (SHVC) bitstream. The proposed SHVC SE uses a logistic map (LM) for enciphering the motion vector difference (MVD), discrete cosine transform (DCT) coefficients and delta quantization parameter (dQP) sign bits. The SHVC SE chaotic video stream cipher is proposed to secure the most sensitive bits of the SHVC while keeping the video format compliance feature. Also, this paper presents a performance analysis for the proposed SHVC SE and the AES in CFB operation mode. Experimental results illustrate the main feature of using the LM in the proposed SHVC SE, which is lower latency encoding time for the SHVC SE chaotic video stream cipher than using the AES in CFB operation mode. Security investigations are performed on the proposed SHVC SE for ensuring the robustness of the ciphered SHVC digital video against unauthorized attacks.