Breaking of Simplified-Data Encryption Standard Using optimized SPSO

In many years Breaking of cryptography Algorithms have been taken into consideration as a challenge. Data Encryption Standard (DES) is used as a standard to keep the information confidential and allows the research studies to investigate it. S-DES is the simplified version of Data Encryption Standard Algorithm which is used by the researchers for investigation. The present study uses SPSO algorithm to break SDES algorithm. To break SDES algorithm the SPSO was optimized. There were some attacks on some blocks of the cipher text and the obtained results revealed that this algorithm had a better performance in detecting main key bits in shortest time so that، in detection factor main key bits، ten main key bits have been discovered and in the time of detection factor main key bits، time over a minute to less than twenty seconds dropped in comparison with Previous work.