An enriched cryptosystem based Polybius cipher using graph labeling techniques

Cryptography is a concept to protect information and communication from adversaries through the use of codes. Graph theory is ultimately the study of graphs. In this paper we are using cryptographic technique together with graph labeling to protect our message being hacked by any adversaries as well as safeguarding the communication. This paper proposes an enriched technique of coding a message based on Polybius cipher and permutation cipher for the regular graph using product edge labeling techniques. The resulting cipher text is forwarded to the receiver in a structure of cipher graph which admits our proposed edge labeling. The receiver, thus decrypts the edge labels using secret keys shared by the sender. Here we make use of
symmetric key cryptosystem as we perform both encryption and decryption using the same key. The main advantage of
symmetric cryptosystem is that it is effective and fast for a huge collection of data.