Bonn-Aachen International Center
for Information Technology





crypto >Students >Teaching >Winter 2018/19 


This course is listed in Aachen carpediem as Cryptography, in Bonn Basis as MA-INF 1103 - Cryptography.


Michael Nüsken

Time & Place

First meeting: Monday, 22 October 2018.


Pre-exam meeting: Thursday, 7 February 2019, 1415, room b-it 2.122.

Exam: Monday, 11 February 2019, 1500-1800, room b-it bit-max (0.109).

Post-exam meeting: Wednesday, 6 March 2019, 1400, room b-it 2.122.

Exam2 (repetitions only): Wednesday, 20 March 2019, 1200-1500, room b-it 0.107.

Post-exam2: Tuesday, 30 April 2019, 1300, room 2.122.

Notes & Exercises

You find notes and exercises at sciebo until September 2019.

Remark: As a student of the University of Bonn or RWTH Aachen you can register an account and install a synchronization tool with sciebo, a university internal ownCloud.


Cryptography deals with methods for secure data transfer. In earlier times this was the domain of military and intelligence agencies, but today modern cryptography has grown into a key technology, enabling e-commerce and secure internet communications. Its many applications range from credit and debit cards, mobile phones, tv decoders, and electronic money to unforgeable electronic signatures under orders and contracts in the internet.

In the course, we discuss two of the current standard tools, namely AES and RSA. Further topics are key exchange, including group cryptography and discrete logarithm, digital signatures and identification, and cryptographic hash functions. We will consider these primitives in the modern light of reducible security (or provable security).


There is a long list of free online books about cryptography.

Further topics:




4+2 SWS.

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