International Journal of Engineering and Technology

Cryptography provides many methods and techniques for secure communication. Currently there are many encryption/decryption algorithms such as DES, AES (Rijndael), Blowfish, etc., are published. However, they are fairly complex and require that one spend a lot of time to comprehend and implement them. This paper introduces simple encryption /decryption algorithm that works fast and fairly secure. In this paper, a new symmetric block cipher algorithm has been developed and is compared with the existing popular algorithms. Simulation results are given to demonstrate the effectiveness of each algorithm. Blowfish and the newly developed algorithms exhibit better performance than other popular existing algorithms.