Cryptanalysis of Stream Cipher: Method Implementation

Abstract

The study of techniques and methods to extract the text from encrypted texts is called cryptanalysis. Nowadays, the aim of ‘breaking’ cryptographic methods by analyzing them is called cryptanalysis. Cryptanalysis is essentially an approach that covers all usable information regarding the investigated techniques as well as the protected data and parameters. By cryptanalysing ciphertexts using stream ciphers, this paper describes the implementation of cryptanalysis techniques. The paper will show how the message was recovered without errors despite the use of simple algorithms. This paper will enhance students’ and researchers’ understanding of cryptanalysis. The ways in which numerical equations are used to analyze protected information systems to identify shrouded components and vulnerabilities are also described. In this contest, the major challenges are to understand these techniques and in using the CrypTool program to answer questions such as: how is each tool selected?; how are they connected?; and what are the inputs and the outputs for each tool? All these challenges are explained using texts or figures.