Chosen plaintext attacking on a hyper-chaos image encryption algorithm

The problems of vulnerability of the image encryption algorithm are proposed by the researchers analyzing the algorithm concerning pixel permutation and diffusion based on the hyper-chaos. Not given any knowledge of the key value, these vulnerable parts are attacked by three plaintext matrixes with their own characters, causing the ciphered-image being recovered at a low computing pay in which the theoretical analysis process, practical block diagram and simulation results of the chosen plaintext attacking are given. According to the results, these imperfect parts cause that the algorithm can not resist the chosen plaintext attacking.