Abstract:

An image blocking scrambling encryption algorithm based on chaotic binary keys and the Gray Code Table is proposed in this paper. The good properties  about chaotic sequences such as their simple forms, sensitive dependence on initial conditions , the statistical characteristics of white noise, and the important characteristics of Gray Code like the good property of space traversing and the ease of generation are combined in the algorithm. The experim ental results prove that the algorithm has good encryption effect and good robustness on common information processing operations, noise attacks and geo metric attacks and so on.

Key words: chaos, Gray Code, space scrambling, picture encryption