Robustness Analysis of Selective Image Encryption Algorithm Based on Arnold Cat Map Permutation

Image encryption in frequency domain has an advantatge of resistance to many image processing operations. This paper presents a robustness analysis of a proposed selective image encryption algorithm based on chaos. The cipher-images was modified by common image processings such as JPEG compression, adding noise, brightness/contrast adjustment, and image resizing. Based on experiment results, the cipher-images were robust to the image processing operations, since the modifications have little influence on low frequency DCT coefficients. The decrypted images can be still recognized well, although they are just like noised.