A Modified Symmetric Image Encryption Scheme Based on Chaotic Map
Xiao Liao · 2007
In ref.[1], a symmetric image encryption scheme is proposed, which is based on 3D chaotic cat maps. In ref.[2], a security analysis has been carried out for the scheme, and pointed that the performance is poor in resistance of chosen plain image attack. Hence, in this letter, a modified symmetric image encryption scheme is presented. In the proposed scheme, when the chaos sequence is generated, the iteration times are hidden to avoid cryptanalysis based on symbolic dynamic. Theoretical analyses and simulated experiment show that, the modified scheme enhances the resistance of chosen plain image attack. At the same time, which also preserves the good performance against others attacks.