关键词: 图像加密;混沌加密;Arnold猫映射;Lorenz混沌系统

Abstract:

Concerning the highdimension chaotic image encryption algorithm proposed by Sun et al., the authors analyzed the potential flaws and proposed corresponding improving methods in terms of security and efficiency respectively. Theoretical analysis and simulation experimental results testify that the enhancement scheme can maintain all the advantages of the original one and conquer the potential flaws. Moreover, the final scheme only needs two encryption rounds to achieve satisfactory performance.

Key words: image encryption;chaotic encryption;Arnold cat map;Lorenz chaotic system