Abstract:

A VEA scrambling encryption algorithm design based on twodimensional Logistic chaos mapping is put forward to deal with the security problem of video information．Firstly we transform the I frame，P frame and B frame of video data by DCT(Discrete Cosine Transform), and scramble the DC and AC coefficients, and then use the two dimensional chaotic sequences of the Logistic chaotic system to encrypt the DC and AC coeficients twice, and then we obtain the encryption data. The video data which are encrypted twice by the chaos key have the characteristics of high security, strong attackresistance and so on.

Key words: image processing;chaos encryption;VEA encryption;Logistic chaotic system;scrambling