A new digital video encryption algorithm based on composite chaotic mapping
Li Tu, Zhen Liu, Yan Wang, Gelan Yang · 2024
In order to improve the security and efficiency of video encryption and improve the speed of video encryption, in this study a video encryption algorithm is proposed based on Tent chaotic mapping and Arnold mapping. Firstly, generated a chaotic sequence by using Tent mapping, and performed type conversion on this sequence; imported a video to be encrypted and read in the specified frame image, separated this image into three channels: red channel, green channel, and blue channel, combined the three channels to form a large matrix; then, performed row and column scrambling by using chaotic sequence, and then performed a secondary scrambling by using Arnold mapping; finally, performed XOR operation on the scrambled matrix to obtain the diffusion matrix, converted the diffusion matrix into three channel images, and then obtain a ciphertext frame image. The simulation results show that: The encryption algorithm is very sensitive to the initial key, and the initial value sensitivity performance reaches10-12,the key space is 2×1023,the average correlation coefficient of adjacent pixels in encrypted image is -0.000087, which is very close to the ideal value of 0.This encryption algorithm can well resist the attack of statistical analysis and it has a good encryption effect on video.