The block ciphers PES and IPES were originally designed with the ambition to become the successor of DES as a standard. In this paper we point out why this would be a bad idea. On one hand a new block cipher (called MMB) is proposed, that uses similar primitive operations as (I)PES but can be more efficiently implemented both in hardware and in software. On the other hand classes of weak keys (...

In the ancient block Hill cipher, the cipher text is obtained by multiplying the blocks of the plain text with the key matrix. To strengthen the keymatrix, a double guard Hill cipher was proposed with two key matrices, a private key matrix and its modified key matrix along with permutation. In the ancient block Hill cipher, the cipher text is obtained by multiplying the blocks of the plain text...

This document describes the RC encryption algorithm a fast symmetric block cipher suitable for hardware or software imple mentations A novel feature of RC is the heavy use of data dependent rotations RC has a variable word size a variable number of rounds and a variable length secret key The encryption and decryption algorithms are exceptionally simple

An information system is very important in today's changing world, and therefore choosing the proper becoming a decision. With time, systems have become more crucial, with multiple problems affecting supply chain continuous writing of performance areas. The principle management aims at values. working states that enhances value by establishing operational units. Traditional manufacturing chains...

In this article, we propose a new method to protect block cipher implementations against Differential Fault Attacks (DFA). Our strategy, so-called “Tweak-in-Plaintext”, ensures that an uncontrolled value (‘tweak-in’) is inserted into some part of the block cipher plaintext, thus effectively rendering DFA much harder to perform. Our method is extremely simple yet presents many advantages when co...