# Cryptography (V2/Ü1)

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## Contact

Please reach out to us via crypto@ti.rwth-aachen.de, regarding this lecture, the exercises, the exam or anything else concerning this course.

## Links to Campus Office

Lecture in ICT cubes, room 002

Exercise in ICT cubes, room 002

Exam

## 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 1
- 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) (17.08.18, 10:00AM, ICT-Cubes, room 333).
- The exam on Cryptography 1 begins on Thursday, August 23, 2018, 11:30 a.m. in the room 1385|003 (OTTO FUCHS-Hörsaal (H03)) and lasts 90 minutes.
- 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 will be published on Thursday, the 30.08.18, 16:00h, on the homepage of the institute.
- Exam inspection (Klausur-Einsicht) (Friday, 07.09.18, 10:00h, ICT-Cubes, room 333)

## Discussion hour

Friday, 13am, ICT cubes, Kopernikusstr.16, 3rd. floor, Room 333, Vimal Radhakrishnan, first time on 20th of April 2018## Consultation hour

Prof. Dr. R. Mathar upon agreement

Dr. Arash Behboodi upon agreement