An improved video encryption method design

In this paper, an improved video encryption method based on coupled logistic chaotic map is proposed. In it, the method adopts coupled chaotic logistic maps as the key-stream generator to encrypt the DCT (Discrete Cosine Transform) coefficients of the video frame. In the whole process, the new method can provide the pseudo-random sequence with good randomness. Therefore, these systems are suitable to the stream cipher. The method provides better security against cipher text-only attacks and known/closen-plaintext attack.