A Colour Video Encryption Scheme Based on Chaotic Maps

Abstract

The development of wireless and mobile communications has led to the expansion 
of digital multimedia (video and image) exchange over computer networks. So,
there is a need to protect video content in many digital applications such as 
confidential video conferencing, medical imaging systems and payTV, etc. Video 
encryption is widely used as a way to provide security for digital video. In this 
paper, we introduce a secure scheme for colour video encryption using chaotic
maps. Video encryption divides the file into a group of images called frames, and 
then the video encryption process goes through five stages: shuffle the video 
frames, permutation, confusion, diffusion on frame level and diffusion on video 
space components level. The proposed scheme uses four chaotic maps to shuffle, 
permutation, confuse, and diffuse the video frames. It also uses two other chaotic
maps to initialize and control the above chaotic maps. The key space of our
scheme is 2 ¹²⁸ which makes the brute force attack impracticable. To analyze 
security and robustness of the proposed scheme, several security tests are used such 
as peak signal-to-noise ratio (PSNR), signal to noise ratio (SNR), histogram 
analysis, correlation coefficient analysis, information entropy, differential attacks,
keyspace, and key sensitivity. The results of the different types of analyses 
indicate that the proposed video encryption scheme has high sensitivity and 

security.