MODIFICATION ADVANCED ENCRYPTION STANDARD (AES) ALGORITHM WITH PERFECT STRICT AVALANCHE CRITERION S-BOX

The Advanced Encryption Standard or better known as the AES Algorithm is a standard algorithm and has been widely used an application of cryptography. Currently, lot research developing about attacks on algorithm. Therefore, there have many studies related to modifications with aim increasing security produce alternatives encryption algorithms that can be secure data. In this study, were made by replacing S-box using perfect SAC in SubBytes process. Perfect exact average value 0.5. will must good strength, therefore tested, namely AC, SAC, BIC, XOR Table Distribution, LAT Distribution tests. Based results it was found had almost same test S-box. Furthermore, after applied algorithm, analyzed how effect these uses randomness testing for block cipher strict avalanche criterion (SAC) test. meet since second round than original values 0.5003 0.5019.