An improved DNA cryptosystem based graph labeling techniques

Cryptography involves in confidentiality, authentication and data security which is an Art of converting readable text or image into an unreadable format, which is easily unbreakable. In recent times, cryptography adopting a many new techniques to protect or hide our communication from any malicious party. In this paper, we proposed a method of encrypting a message using DNA Cryptosystem together with Graph labeling techniques. Thus, our message is converted in the form of human deoxyribonucleic acid by the use of ASCII and Binary value. Finally which is presented as a cipher graph using product edge labeling techniques which is sent to the receiver along with some kind of clues. The receiver has to use the clue to trace our message which is shared by the sender. Here we used complete graph K5 to pass our secret message. In this method a common key is shared between sender and receiver. The advantage of symmetric cryptosystem is faster and secure.