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A Novel Approach of Symmetric Key Cryptography

Cryptography plays an important role in secured data communication over the network using unknown, untrusted mediums. In the fast digital transformation, traffic on network increasing rapidly where users are always connected, being online, anytime anywhere. As part of data, extortions like altering, spoofing and snooping of are quite common over the network by unauthorized access. Cryptography is well known mechanism where asymmetric or symmetric algorithms using public or private keys provide secure data communication. There are many more cryptography algorithms existing but with emerging technologies and diverse application domains seeking consistent enhancement and better performance with resource restriction. In this paper, we present a novel symmetric cryptography technique based on Caesar cipher symmetric cryptography technique to transform the original text/message into secret text/message. In this technique, the sender transmits hash code instead of symmetric key and Hash code provides the symmetric key to the receiver to decrypt the message of a sender. Proposed method works for all 256 characters having ASCII value from 0 to 255.