TY - JOUR AU - Vimalathithan R. AU - M. Valarmathi PY - 2012/03/13 Y2 - 2024/03/29 TI - Cryptanalysis of Simplified-AES using Particle Swarm Optimisation JF - Defence Science Journal JA - DSJ VL - 62 IS - 2 SE - Computers & Systems Studies DO - 10.14429/dsj.62.778 UR - https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/778 AB - Particle swarm optimisation (PSO) based cryptanalysis has gained much attention due to its fast convergence rate. This paper proposes a PSO-based cryptanalysis scheme for breaking the key employed in simplified-advance encryption standard (S-AES). The cost function is derived using letter frequency analysis. The novelty in our approach is to apply ciphertext-only attack for an S-AES encryption system, where we obtained the key in a minimum search space compared to the Brute-Force attack. Experimental results prove that PSO can be used as an effective tool to attack the key used in S-AES.Defence Science Journal, 2012, 62(2), pp.117-121, DOI:http://dx.doi.org/10.14429/dsj.62.778 ER -