Cryptography encryption algorithm for augmented security

Abstract

We live in times where technology is advancing at an unprecedent rate. From online communication, shopping, data sharing, cashless payments to transmitting sensitive information through internet, everything is being done online. These online methods of data transfer are always vulnerable to online phishing and frauds. Therefore, it becomes very imperative to devise ways for safe and secure transmission of data. To keep up this, new and secure cryptographic schemes are the need of the modern age. In this paper, the author presents a new improvised encryption technique which makes modifications in the traditional approach of the Caesar cipher by combining it with extended Hill cipher. Additionally, it makes use of the Linear congruential method to generate the randomized secret key.