Cryptography
News
- There will be no Tutorial on May 16. Exercise sheet 3 will be active from May 16 to May 23.
- Exercise sheet 1 is now available below.
- Please note that the rooms for lectures have changed!
- Please register for this course at UniWorX.
Content
The course provides an introduction to modern cryptography and covers both theoretical concepts and practical aspects. In particular, on the theory side we will get to know the basics of semantic security and rigorous proofs of security by reduction. On the practical side we will learn about popular cryptographic schemes like AES, RSA, and ECC as well as hash functions and digital signatures. If time permits we will also take a glimpse at cryptanalysis and at cryptographic protocols and their security.
The course is based on the book "Introduction to Modern Cryptography" by Jonathan Katz and Yehuda Lindell, Chapman & Hall, 2008.
The lectures will be presented on the whiteboard and there will therefore be no transparencies available for download. We will, however, indicate the sections of the textbook covered in each lecture and provide ASCII summaries of the material.
Organization
- Volume: 3+2 academic hours per week, 6 ECTS
- Lecture: Prof. Dr. Martin Hofmann
- Tutorials: Dr. Ulrich Schöpp
Place and Time
| Session | Time | Begin | |
|---|---|---|---|
| Lecture | Monday, noon-2pm | Geschw.-Scholl-Pl. 1, M 114 | 24.04.2017 |
| Lecture | Thursday, 2pm-4pm | Schellingstr. 3, S 002 | |
| Tutorial | Tuesday, 2pm-4pm | Theresienstr. 41, C 111 | 02.05.2017 |
To reach the planned 3 hours per week, lectures will only be held on the dates shown in the table below. Tutorials are held every week.
Table is still provisional. Please check again later!
| Nr | Date | Topic | Sections in textbook | Notes | Lecturer |
| L1 | 24.04.17 | Organisation, overview, historic ciphers: shift cipher, frequency analysis | 1.1-1.4 | Ch.1 | MH |
| L2 | 27.04.17 | Vigenere cipher, one-time pad, Shannon's theorem | 2 |
Ch. 2 (updated 05/05) |
MH |
| 01.05.17 | (Public holiday) | ||||
| L3 | 04.05.17 | Forms of attack, kpa, cpa etc. Semantic security | 3.1, 3.2 | Ch. 3 | MH |
| 08.05.17 | x | ||||
| 11.05.17 | x | ||||
| L4 | 15.05.17 | Pseudorandom generators | 3.3 | Ch. 4 | MH |
| L5 | 18.05.17 | Security against chosen plaintext attacks, pseudorandom functions | 3.4 | Ch. 5 | MH |
| L6 | 22.05.17 | Block ciphers, modes of operation | 3.6 | Ch. 6 | MH |
| 25.05.17 | (Public holiday) | ||||
| L7 | 29.05.17 | Practical block ciphers. Principles: s/p- and Feistel networks | 5.1, 5.2 | MH | |
| L8 | 01.06.17 | DES, AES | 5.3-5.5 | MH | |
| 05.06.17 | (Public holiday) | ||||
| L9 | 08.06.17 | Cryptanalysis | 5.6, LSFR insecure (Buchmann) | MH | |
| L10 | 12.06.17 | Message integrity, hashing | 4.1-4.5 | MH | |
| 15.06.17 | (Public holiday) | ||||
| L11 | 19.06.17 | Merkle-Damgard construction, SHA | 4.6 | MH | |
| L12 | 22.06.17 | Number theory and hardness assumptions | 7.1-7.3 | ||
| L13 | 26.06.17 | Diffie-Hellman key exchange, RSA | 9, 10.5 | MH | |
| L14 | 29.06.17 | El Gamal, Elliptic curve cryptography | 10.5 | MH | |
| L15 | 03.07.17 | Factoring and computing discrete logarithms | 8 | MH | |
| L16 | 06.07.17 | Semantic security of public key cryptography with random oracles | 13 | ||
| 10.07.17 | x | x | |||
| 13.07.17 | x | x | |||
| 17.07.17 | x | x | |||
| L17 | 20.07.17 | Protocol security (Needham Schroeder) | US | ||
| L18 | 24.07.17 | Authentication, digital signatures (Schnorr, Guillou-Quisquater) | 12 | MH | |
| L19 | 27.07.17 | A glimpse at quantum and post quantum crypto (not relevant for exam) | MH |
Legend: L means lecture.
Tutorials
- Sheet 1, file vigenere.txt for Exercise 1-2; solutions will be discussed in the Tutorial on 2 May.
- File vigenere.hs to solve Exercise 1-2.
- Sheet 2; discussed in the Tutorial on 9 May
- Sheet 3; discussed in the Tutorial on 23 May
- Sheet 4; discussed in the Tutorial on 30 May
Material
- Katz and Lindell, Introduction to Modern Cryptography (2nd edition)
Exam
- Wednesday, 9 August, 10am - 12am
- Room M 118, Main Building, Geschwister-Scholl-Platz
There will be a make-up exam at the beginning of the winter term. Details to follow here. Participants that did not partake in the first exam are also allowed to register for the make-up exam, provided that they acknowledge that there will not be third exam offered.
Document Actions