1. Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown 2. Chapter 11 –Message Authentication and Hash Functions At cats'…

1. Cryptography and Network Security Chapter 11 Fourth Edition by William Stallings Lecture slides by Lawrie Brown/Mod. & S. Kondakci 2. Message Authentication • message…

Chapter 3 Traditional Symmetric-Key Ciphers 3.1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3 Objectives ❏ To…

1. S-38.3153 Mikko Säreläkeskiviikkona 28. maaliskuuta 2012 2. Today’s plan • Learn about protocols• Remote login • How to solve security problems? • How can…

1. An Overview of Cryptography An Overview of CryptographyGary C. Kessler 3 February 2011 (Original version: May 1998) A much shorter, edited version of this paper appears…

Pseudo-Random Generators Why do we need random numbers? • Simulation • Sampling • Numerical analysis • Computer programming (e.g. randomized algorithm) • Elementary…

The CAST-256 Encryption Algorithm Carlisle Adams CAST-256 is a symmetric cipher designed in accordance with the CAST design procedure as outlined in [A97]. It is an extension…

Slide 1SHASHIDHAR PERURU Tamper Resistant Security Mechanisms for Secure Embedded Systems 1 Slide 2 OUTLINE Introduction Classification of attacks Countering attacks Case…

Slide 1 Session 2 Symmetric ciphers 1 Slide 2 Stream cipher definition Recall the Vernam cipher: Plaintext 000110111101101 Ciphertext 110000101000110 (Running) key 110110010101011…

Slide 1 Creating Secret Messages Slide 2 2 Why do we need to keep things secret? Historically, secret messages were used in wars and battles For example, the Enigma cipher…