Modified Hill Cipher for a Large Block of Plaintext with Interlacing and Iteration

V U K Sastry ,N Ravi Shankar

doi:10.3844/jcssp.2008.15.20

Abstract

In this research, we have developed a large block cipher by modifying the Hill cipher. In this, we have introduced interlacing of the binary bits of the plaintext as the primary concept leading to confusion. This process is strengthened by using iteration. The cryptanalysis and avalanche effect mentioned in this research clearly exhibit the strength of the cipher.

Highlights

IntroductionIn a recent research[1], we have developed a block cipher using a large key matrix
The process of decryption is governed by the relationIn a recent research[1], we have developed a block cipher using a large key matrix
We have used interlacing of the binary bits of the plaintext vectors, occurring in the plaintext matrix, as the primary concept

Summary

Introduction

In a recent research[1], we have developed a block cipher using a large key matrix. We have used interlacing of the binary bits of the plaintext vectors, occurring in the plaintext matrix, as the primary concept. The multiplication of the plaintext with the key causes diffusion and the interlacing of the plaintext at various stages of iteration causes confusion in an effective manner. Our objective is to develop a block cipher, wherein the block is taken in the form of a large matrix. The plaintext block is taken in the form of an 8×8 matrix and in the second one, it is taken as a whole in the form of a matrix which has 8 rows and any number of columns, depending on the size of the entire plaintext

Objectives

Results

Conclusion