Network Security (IN2101)

Prof. Dr.-Ing. Georg Carle, Dr. Heiko Niedermayer, Cornelius Diekmann

4 (3+1)

5.0

English

Tue 14:15-15:45, Interim HS 2
Thu 10:15-11:45, MI HS 1
Exercises will take place at certain time slots of the lectures; these will be announced during the course.

This lecture is an introduction to the field of network security and its fundamental topics like cryptographic operations, threats, and security goals. This is used further as a starting point and requirements for the design of secure networks are discussed. Modern security protocols in modern network protocols and architectures are presented as well as vulnerabilities in existing systems.

TUMOnline.

Main Exam: Saturday, 06.02.2016. 13.00-15.30 (please be there on time at 13:00! Writing time: 13.30-15:00)
Retake Exam: Yes, there will be a retake exam. Watch TUMonline for the date. Currently scheduled for 06.04.2016. Writing time: 08:30 - 10:00
The exam is closed-book. All you need, and will be allowed to use, is a black or blue pen (not a pencil). Material from the lecture (slide deck, material from tutorial/exercises) or smartphones/smartwatches/google glasses/calculators are not allowed.

There will be programming assignments this year. We suggest that you are already familiar with python.
Recommended reading: diveintopython3


* Still looking for a secure mobile messenger with a modern secure channel? Try signal!
* 04.02.1016 (last lecture before exam): 10:30-12:00, exam Q&A
* Beware: The exercise servers will not stay online forever.

Exercise 01

• Description, client.py
• Errata: it should be security goals
• Discussion (1/2): Thu 15.10.2015
• Discussion (2/2): Tue 20.10.2015
• decrypting solution: openssl aes-128-cbc -d -salt -in solution.pdf.aes-128-cbc -out solution.pdf

Exercise 02

• Description, client.py, server
• : 100 Attempts is not a DOS
• Discussion (1/2): Tue 20.10.2015
• Discussion (2/2): Thu 22.10.2015 (solution)

Exercise 03

• Description
• Discussion (1/2): Tue 27.10.2015
• Discussion (2/2): Tue 03.11.2015 (solution)

Exercise 04

• Description, alice.py, bob.py
• Discussion (1/2): Thu 29.10.2015
• Discussion (2/2): Thu 05.11.2015 

Exercise 05

• Description, alice.py, bob.py
• Discussion (1/2): Thu 17.11.2015
• Discussion (2/2): Tue 19.11 (solution)

Exercise 06

• Same as 05 (++port) but Bob changed the format. Does it help? Hint: now you need to do XOR.
  alice.py, bob.py
• Discussion (1/2): Thu 26.11.2015
• Discussion (2/2): Task 1-3: Tue 01.12.2015; Exercise 4-5: 08.12.2015 (solution)

Exercise 07

• This time, you need to reverse engineer the protocol. eve.py commonlib.py (online: 26.11.2015)
• Discussion (1/2): Tue 08.12.2015
• Discussion (2/2): (solution)

Exercise 08

• Port 20008
• Discussion (1/2): Tue 26.01.2016
• Discussion (2/2): (solution.pdf.aes-128-ctr)

Slides