Seminar Advanced Topics in Crytography

Corresponding entry in Aachen Campus, Bonn University.

Lecture

Time & Place

Thursday 10⁰⁰- 12⁰⁰, b-it 1.25.

First meeting: Thursday, 15 April 2010, 10⁰⁰, b-it 1.25.

Prerequisites

Basic knowledge of cryptography and fast understanding of mathematical and computer science topics is required.

Each semester this seminar tries to dig deep into one specific topic within the wide area of cryptography and related subjects. This subject is chosen short before the start (though ideas may be around much earlier).

This semester's topic is

Symmetric mobile cryptography

We will start with a discussion of the algorithms used for securing communication with mobile phones and the most successful attacks. We will consider GSM and UMTS.

Schedule

29 April 2010, 10⁰⁰ - 17 June 2010, 1000, Markus Ritter:
GSM: Algorithms and attacks.
24 June 2010, 1000, Michael Nüsken:
UMTS: Algorithms f8, f9 and Kasumi.
1, 8 July 2010, 1000, Heiner Utz, 15 July 2010, 1000, Daniel Loebenberger:
The attack by Dunkelman, Keller & Shamir
22 July 2010, altogether:
Round 8

Literature

3GPP (2010f). 3GPP Specification series, Security algorithms (3). In particular,
- TS 35.201 Specification of the 3GPP confidentiality and integrity algorithms; Document 1: f8 and f9 specification.
- TS 35.202 Specification of the 3GPP confidentiality and integrity algorithms; Document 2: Kasumi specification.
Elad Barkan, Eli Biham & Nathan Keller (2006). Instant Ciphertext-Only Cryptanalysis of GSM Encrypted Communication by Barkan and Biham of Technion (Full Version, PDF).
Orr Dunkelman, Nathan Keller & Adi Shamir (2010). A Practical-Time Attack on the A5/3 Cryptosystem Used in Third Generation GSM Telephony. Cryptology ePrint Archive: Report 2010/013.
Wikipedia (2010f). KASUMI (block cipher).

Allocation

S2.

Media Informatics, Communication Skills.
University of Bonn - Computer Science, A or A1.
University of Bonn - Mathematics.