International Journal of Emerging Technology and Advanced Engineering (IJETAE)
The demand for effective internet security is increasing exponentially day-by-day. So for high protection, maintaining integrity of the data a robust and secure security system is needed. Cryptography is the science of making communications unintelligible to everyone except the intended receiver(s). A cryptosystem is a set of algorithms which are indexed by some key(s), for encoding message into cipher text and decoding back into plain text. This paper gives a new algorithm for encryption and decryption. The algorithm is based on the process of substitution and genetic function. Here each letter of a plain text is placed into a circular path of the proposed model, by using a random number, substitution of the plain text into intermediate cipher text, is done in a unique way.