Journal of Applied & Computational Mathematics

Security System through Matrices in Cryptography

Abstract

Jannatul Naime, Muhammad Hanif* and A N M Rezaul Karim

Communication over the internet must be secure to prevent intercepting or accessing sensitive information. Attempts are being made to protect confidential information by providing maximum security over the network. One of such techniques is using matrix multiplication for Hill Cipher cryptosystem, which is not easily breakable. The traditional Hill Cipher algorithm uses 2 × 2 and 3 × 3 matrix for generating keys. In this paper, we enhance the existing algorithm by using 4 × 4 matrix to generate the keys and to demonstrate the application of this algorithm created in MATLAB programming language. We also compare the time consumed to encode and decode the message by the traditional Hill Cipher algorithm. The enhanced Hill Cipher algorithm to get a clear idea which algorithm is more efficient and reliable and not easily breakable by the intruders.