International Journal of Computer Applications
In this paper, the authors are to provide security for the data that contains alphabets and integer values during the transmission, when data is transmitted form sender to receiver. As they know that playfair technique if best for multiple letter encryption, which treats the plain text as single units and translates these units into cipher text. It is highly difficult to the attacker to understand or to decrypt the cipher text. The existing playfair technique is based on the use of a 5 X 5 matrix of letters constructed using a keyword. This algorithm can only allow the text that contains alphabets only.