A novel encryption scheme based on the composite chaotic system
Changze Wu · Journal of Henan Polytechnic University · 2012
Based on compound chaotic systems with variable control parameters,a novel image encryption scheme is proposed.Firstly,the system parameter of the Logistic map is chosen according to the map itself and a nonlinear coupled function is constructed with a 3D chaotic system to scramble the pixels of the plaintext.At the same time,gray-level transformation is operated after each round of scrambling according to the chaotic sequences and plaintext.Hence,the proposed algorithm owns the characteristics necessary for cryptosystem such as confusion and diffusion,etc.Simulation experiments and the security analysis indicate that the proposed scheme has a large key space together with excellent statistical properties,and can resist exhaustive attack,differential attack and chosen-plaintext attack,etc.