Lapped Cuboid-based Perceptual Encryption for Motion JPEG Standard

This paper proposes cuboid-based perceptual encryption (Cd-PE) and a version of cube-based perceptual encryption (C-PE), named lapped cuboid-based perceptual encryption (LCd-PE), to enhance the security for Motion JPEG (MJPEG). Although C-PE provides a high level of security by dealing with several frames of the input video sequence simultaneously, keyless attackers may illegally decrypt the encrypted video sequence with conceivable attacks such as a cube-based jigsaw puzzle solver (CJPS) attack. LCd-PE subdivides the video sequence pre-encrypted with C-PE into small cuboids and further encrypts it so that attackers cannot conduct attacks such as CJPS. The experiments show that the compression performance of an encryption-then-compression (ETC) system with LCd-PE and MJPEG is almost equivalent to that of one using C-PE and yet achieves a higher level of security.