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Network Security [NetSec]

Summer 2011


This course introduces various aspects of network security. Starting with a discussion of threats and possible attacks, requirements for the design of secure networks will be introduced. We study basic cryptographic algorithms and protocols and, most importantly, their use and integration into state-of-the-art network protocols and architectures. Furthermore, attacks and possible countermeasures will be discussed.

The basic introduction to cryptography and cryptographic protocols follows the recommendations of the Mustercurriculum Kryptologie of the "Fachgruppe für Angewandte Kryptologie der Gesellschaft für Informatik".

    • Cryptography
      Basics, symmetric cryptography, asymmetric cryptography
    • Cryptographic Techniques
      Modification check values, random number generation
    • Security Protocols
      Cryptographic protocols, integrating security services into communication architectures
    • Security of Communication Protocols
      Medium access (PPP, 802.1x, WLAN), network layer (IPSec), transport/session layer (SSL, TLS)
    • Security in Mobile Networks
      Location privacy, pseudonyms, mix networks
    • Attack Detection and Countermeasures
      Attack detection and prevention, IP traceback

Learning Outcome

The learning objective is to unserstand the fundamental concepts of network security. Students understand these concepts and are able to apply this knowledge.

General Information / Methods

This master course will be held in English and all the course material is available in English. Oral exams can be organized in English as well as in German.

  • Lecture, 2 SWS, 4 ECTS
  • Proseminar, 3 SWS, 6 ECTS



  • Lecture (LV 703779)
    Vorbesprechung: 7.3.2011, 10:15, 3W04
    Wednesday, 8:30am - 10:00am, HS 11
    Thursday, 12:15pm - 1:45pm, HS 11
  • Proseminar (LV 703780)
    Wednesday, 10:15am - 11:45am, RR 22
    Thursday, 10:15am - 11:45am, RR 22


There will be oral exams for the lecture. We will provide more information at the end of the summer term. The grading of proseminar will be based on the assignments and the discussion of the home work.

Oral examination is by appointment.


Many thanks for the critical and helpful evaluation! In total, we received feedback from 16 students for the lecture and from 20 students for the proseminar.


  • Günter Schäfer, Netzsicherheit: Algorithmische Grundlagen und Protokolle, Heidelberg, Germany, dpunkt.verlag, 2003. [BibTeX, Details...]
  • William Stallings, Cryptography & Network Security, ed. 4, Prentice Hall, 2005. [BibTeX, Details...]


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