Security analysis of advanced encryption standard (AES) for image encryption

In recent years, there have been major advancements in multimedia technologies and accordingly, file transfer over the internet has become extremely frequent. However, some security issues can occur in the internet, since it is a very insecure channel. To preserve the privacy and security of multimedia data transmitted over the internet, a number of encryption algorithms have been developed. This research presents a methodology for examining practically used image processing encryption algorithms. To measure the quality of encoded images, a number of factors such as correlation coefficient and information entropypixel change rate are employed instead of visual evaluation. In this study, the image encryption efficiency of the Advanced Encryption Standard (AES) is analyzed and the security level is evaluated. For digital pictures, AES security evaluations have been conducted against brute force, statistical, and other attacks. The results of the tests are provided to see if these algorithms are secure for digital photos. Examination of the image encryption algorithms reveal that images can be encrypted by the AES method robustly. Applied tests are independent from encryption algorithm and thus they are applicable to all image encryption algorithms.