Institute for Theoretical Information Technology

Cryptography (V2/Ü1)

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Links to Campus Office

Lecture
Exercise
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.

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.

Exercises

• Exercise 1 – Solution
• Exercise 2 – Solution
• Exercise 3 – Ciphertext – 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
• Review – Solution

Information about the Exam

• Review exercise (Zusatzübung) (04.08.15, 2:00PM, ICT-Cubes, room 333).
• Extra consultation hour (Sprechstunde) (11.08.15, 10:00AM, ICT-Cubes, room 333).
• The exam on Cryptography 1 begins at 8:30h in the room 1515|002 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 are now online. The access codes are found on the information sheets distributed during the exam.
• Exam inspection (Klausur-Einsicht) (25.08.15, 10:00AM, ICT-Cubes, room 333)

Consultation hour

Dr.-Ing. Henning Maier upon agreement
M.Sc. Jose Angel Leon Calvo upon agreement
Prof. Dr. R. Mathar upon agreement