The advent of electronics has played a vital role in the development of communication system. One of the major issues in the field of communications is maintaining security and privacy of the data transmitted and received. Secured communications means transmission of data between the sender and receiver without any loss of original information. One of the methods for secured transmission is cryptography. Cryptography consists of two techniques-encryption and decryption. In encryption the original message is converted into unreadable cipher text with the help of an encryption key. The transmitted encrypted data will be decrypted on the sender side with the same key used at the transmitter side.