The main objective of data transfer is providing good security to data and faster data encryption, communication and decryption. In this paper we find out how encryption process and decryption process can be done faster by splitting the original message to bigger block sizes. AES algorithm is designed to provide more security by doing higher value encryption and decryption. By this methodology we can provide more security to the data and the time can be consumed by dividing the block sizes to larger size than 64 bits.

Keywords : DES, AES, Cipher Block Chaining, Security.