# Cryptography (V2/Ü1)

The information on this website is also available in the Lehr- und Lernportal der RWTH Aachen. Every participant should sign up there.

## Links to Campus Office

## Contents

- Classical cryptosystems
- Cryptanalysis of classical systems
- Entropy and perfect secrecy
- Fast block ciphers
- Number theoretic reference problems
- Cryptosystems based on discrete logarithms
- Public key cryptography

## Prerequisites

Basic knowledge in stochastics and number theory.

## Literature

**Our lecture notes for Cryptography & Advanced Methods of Cryptography.**- Handbook of Applied Cryptography by Menezes, van Oorschot and Vanstone.
- Lecture notes of the lecture Stochastik für Informatiker by R. Mathar.
- The book Informationstheorie by R. Mathar.
- Complete list of the bibliography.

## Help-sheet

- Help-sheet for Cryptography (english version)
- Hilfsblatt zur Kryptographie (german version)

## Pocket Calculator

While taking the written exam, you are allowed to use a pocket calculator from this list.## Exercises

- Homework 1 (2014-04-17)
- Homework 2 (2014-05-08)
- Homework 3 (2014-05-15), Ciphertext from Exercise 10
- Homework 4 (2014-05-22)
- Homework 5 (2014-06-05)
- Homework 6 (2014-06-26)
- Homework 7 (2014-07-03)
- Homework 8 (2014-07-10)
- Homework 9 (2014-07-17)

## Consultation hour

Prof. Dr. R. Mathar upon agreement

Dipl.-Ing. Markus Rothe upon agreement

Milan Zivkovic M.Sc.EE upon agreement