Image encryption scheme based on hyper-chaotic sequence.

In order to improve the security of secret image transmission, this paper put forward a kind of image encryption scheme based on hyper-chaotic sequences. Firstly, it added plaintext pixel information to the transformation of each element of hyper-chaotic sequences which resulted in both key sensitivity and plaintext sensitivity. Then, it shuffled and encrypted the plaintext pixels according to the separation scrambling key sequences and the gray replacement key sequences pixel by pixel. The simulation results show that the gray distribution of encrypted image is balanced with its cipher-text sensitive to plain-text and key, and it is secure with strong resistibility to various attacks, such as statistical, exhaustive and differential attacks, verifying the feasibility of this scheme. [ABSTRACT FROM AUTHOR]