  Cryptography is the study of methods of sending messages in disguised form so
that only the intended recipients can remove the disguise and read the
messages. Information security has become a very critical aspect of modern
communication systems. With the global acceptance of the Internet as a medium
of communication, virtually every computer in the world is connected to every
other. It has created a new risk for the users of the computers with a constant
threat of being hacked and being victims of data theft. In this connection data
encryption has become an essential part of secure communication of the
messages. In the present paper we propose a new method of encryption of data in
blocks using the operations Rotation and Logical XOR
