A Chaotic Image Encryption Algorithm Robust against Phase Space Reconstruction Attacks

摘要

This paper describes a modification of a chaotic logistic map which could be exploited in a field of image encryption. After a summary of basic image encryption methods and problems, the paper mentions properties of a modified version of the logistic map. It is shown that the proposed changes help to achieve greater robustness against phase space reconstruction attacks. The paper also describes the usage of a modified map in an image encryption algorithm. Other techniques applied in the proposed algorithm include key diffusion, ciphertext chaining or four step diffusion stage. Evaluation of properties of the proposed algorithm is done by means of commonly used techniques. The numerical results are then compared with values obtained by other published algorithms.