# 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.
- Video recordings of the lecture in SS2015/16 by Video AG.

## Lecture Notes

- Lecture 2
- Lecture 3
- Lecture 4
- Lecture 5
- Lecture 6
- Lecture 7
- Lecture 8
- Lecture 9
- Lecture 10
- Lecture 11
- Lecture 12
- Lecture 13
- Lecture 14

## Exercises

- Exercise 1 – Solution
- Exercise 2 – Solution
- Exercise 3 – Solution
- Exercise 4 – Solution
- Exercise 5 – Solution
- Exercise 6 – Solution
- Exercise 7 – Solution
- Exercise 8 – Solution
- Exercise 9 – Solution
- Exercise 10 – Solution
- Exercise 11 – Solution
- Exercise 12 – Solution
- Exercise 13 – Solution
- Review Exam – Solution

## Help-sheet

- Help-sheet for Cryptography (english version only)

## Pocket Calculator

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

- Review exercise (Zusatzübung) (24.08.17, 10:00AM, ICT-Cubes, room 333).
- The exam on Cryptography 1 begins on Tuesday, August 29, 2017, 01:30 p.m. in the rooms 1385|003 (H03) and 1090|321 (Eph) and lasts 90 minutes.
- Students with matr. number from 222XXX to 333XXX should go to Claßenstr. 11, 52072 Aachen, C.A.R.L. 1385|003 (H03) for the examination.
- Students with matr. number from 334XXX to 376XXX should go to Schinkelstraße 2, 52062 Aachen , Rogowski-Institut u.a. 1090|321 (Eph) for the examination.
- During the exam you are allowed to use a pocket-calculator that is enlisted in the list above. We will distribute the official help sheet (English version) at the beginning of the exam.
- The results of the exam are now online. The access codes are found on the information sheets distributed during the exam.
- Exam inspection (Klausur-Einsicht) (Friday, 08.09.17, 10:00h, ICT-Cubes, room 333)

## Discussion hour

Friday, 11am, ICT cubes, Kopernikusstr.16, 3rd. floor, Room 333, Vimal Radhakrishnan, first time on 28th of April 2017## Consultation hour

Prof. Dr. R. Mathar upon agreement

Dr. Arash Behboodi upon agreement

M.Sc. Qinwei He upon agreement