SHUFFLING BASED SELECTIVE SCRAMBLING FOR VIDEO CONTENTS PROTECTION

摘要

A shuffling based selective scrambling method is provided to reduce computation complexity by using only a shuffling method without an encryption algorithm such as DES or AES which has a large amount of computation, thereby minimizing a processing cost, and maintaining format compliant without increasing the amount of compressed bit streams. A shuffling based selective scrambling method for video contents protection in a method for encrypting compressed video contents includes: a DC shuffling step of shuffling a DC, in the unit of slice, wherein the DC is a first value among coefficients of blocks in an intra frame in which DCT and quantization has terminated; and a block shuffling step of shuffling the blocks which are DC-shuffled in the DC shuffling step in the unit of slice.