A Self-adaptive Image Cryptosystem Based on Hyper-chaos

Many cryptosystems have weak anti-attack performance facing chosen plaintext attack and chosen cipher-text attack, and generally the solution is cipher block chaining (CBC) that makes the serial operation necessary in encryption process. However, the parallel operation is useful to improve operation speed and is valuable to encrypt large data. Therefore, in view of the computer operating system in which the serial and parallel operations coexist currently, we propose a self-adaptive image cryptosystem based on hyper-chaos. The proposed algorithm not only can solve the problem of weak anti-attack performance, but also can support both serial and parallel operations. Theoretical analysis and simulation results show that the algorithm not only can resist chosen plaintext attack and chosen cipher-text attack effectively, but also can obtain better statistical characteristics and difference characteristics.