Design and Analysis of Security Protocol for Communication

6Recursively Paired Arithmetic Technique (RPAT): An FPGA-Based Block Cipher Simulation and Its Cryptanalysis

Rajdeep Chakraborty¹* and J.K. Mandal^2†

¹ Department of CSE, Netaji Subhash Engineering College, Kolkata, India

² Department of CSE, FETM, University of Kalyani, Kalyani, India

Abstract

In this chapter a novel and yet simple cipher is proposed, which is fit for track Cryptography and Computer Science and Statistics Journal. Recursively Paired Arithmetic Technique (RPAT), which is an FPGA-based block cipher simulation and its cryptanalysis, is being done with Pearsonian Chi-Square test for non-homogeneity between plaintext with ciphertext and Avalanche ratio test. This cipher is a bit level cryptography where a source stream is considered into a block and RPAT is applied to get the target stream, this cipher has four different types of encryption/decryption processes. So, TB = RPAT (SB, OP), Target Block (TB) is the output of the function Recursively Paired Arithmetic Technique (RPAT) with input parameters, Source Block (SB) and encryption/decryption Options (OP). This cipher has been implemented in IEEE VHDL and simulated for FPGA in Xilinx ISE 8.1i. A good and comparable cryptanalysis result has been found against widely used RSA and TDES.

Keywords: Avalanche ratio test, pearsonian chi-square test, IEEE VHDL, FPGA, XilinX ISE 8.1i

6.1 Introduction

In this era of information and communication technology the digital security has become inevitable [1, 2, 6]. This proposed ...