Video Encryption Method Based on Logistic and Baker Mapping
YU Zhe-zhou · Journal of Jilin University · 2008
In order to protect security for the transmission of networking infornation,a video image encryption method based on the video image compression and cryptography technology is presented.The method introduces Logistic mapping and Baker mapping of the chaotic system,combining the features of H.264 video coding,and utilizes Braker mapping to scramble for positions of the block of DCT(Discrete Cosine Transform)-quantifiable and change the location of space pixel.Then the password sequence is qenerated through pseudo-random sequence produced by Logistic mapping,and changing numerical value of block matrix pixel.Finally after finishing entropy coding,using pseudo-random sequence produced by Logistic mapping takes drifting stream encryption to 0,1 binary strings.The arithmetic has low computing complexity,good safety and real-time,smaller impact on performance of encoding compression.