Chair of Computer Networks

Latest News

The oral presentation of the bachelor's thesis entitled "Diabetes Tagebuch - Implizites Crowdsourcing von Nährwerten mithilfe einer mobilen App" of Mr. Opitz will take place on May 2nd at 15:00 in room 25.13.02.28.

The oral presentation of the bachelor's thesis entitled "Automatisierte Qualitätskontrolle von Webanwendungen mit Hilfe von Selenium-Tests" of Virgil Grigoras will take place on April 30th at 11:00 in room 25.12.02.33.

The oral presentation of the master's thesis entitled "Lossless Arithmetic Coding of Discrete Vehicular Trajectories" of Matthias Radig will take place on April 9th at 10:30 in room 25.12.02.33.

Die Prüfungstermine für die Prüfungsfächer: Rechnernetze, Vertiefung Rechnernetze entnehmen Sie bitte der PDF

The oral presentation of the bachelor's thesis entitled "Angriffe auf Publish/Subscribe-Systeme" of Christina Klages will take place on March 18th at 11:15 in room 25.12.02.33.

Some Publications

Yves Igor Jerschow, Martin Mauve.
Modular Square Root Puzzles: Design of Non-Parallelizable and Non-Interactive Client Puzzles.
Computers & Security 35 (), pp. 25-36, 2013

Markus Koegel, Matthias Radig, Erzen Hyko, Martin Mauve.
A Detailed View on the Spatio-Temporal Information Content and the Arithmetic Coding of Discrete Trajectories.
Mobile Networks and Applications, pp., 2012.

Christian Lochert, Björn Scheuermann, Martin Mauve.
A Probabilistic Method for Cooperative Hierarchical Aggregation of Data in VANETs.
Elsevier Ad Hoc Networks 8 (5), pp. 518-530, July 2010

Björn Scheuermann, Christian Lochert, Jedrzej Rybicki, Martin Mauve.
A Fundamental Scalabiliy Criterion for Data Aggregation in VANETs.
MobiCom 2009: Proceedings of the Fifteenth ACM SIGMOBILE International Conference on Mobile Computing and Networking, Beijing, China, September 2009.

Björn Scheuermann, Wolfgang Kiess, Magnus Roos, Florian Jarre, Martin Mauve.
On the Time Synchronization of Distributed Log Files in Networks with Local Broadcast Media.
IEEE/ACM Transactions on Networking 17 (2), pp. 431--444, April 2009.

Our Areas of Research

Computer networks have revolutionized the way people and machines communicate. We are interested in all aspectes of computer networking, from wireless networks to high speed backbones, from medium access up to distributed applications. Our focus is on solving real-world problems: we often start our work by looking at a specific application and then investigate what is missing to provide optimal network support for this application. We enjoy working with, building, and evaluating real-world systems. At the same time we use theoretical analysis to determine the fundamental characteristics of our solutions and simulation to gain an insight how they work in a complex environment. The following sections give an overview of our current research activities.

Distributed Infrastructure for Internet-Mediate Cooperative Normsetting

Rules are vital for any group of individuals in order to solve problems of social life and to accomplish common goals. We are interested in the self organization of potentially very large groups by means of cooperative development of rules. Motivated by events like the Arab Spring and the success of the german Pirat Party we are doing research on the infrastructure required for this purpose. More specifically, we are designing, developing and deploying a distributed architecture for cooperative normsetting that is censorship resistant, independent of any individual or organization and at the same time accessible and usable even in extreme situations, such as a complete network outage. Further, we look at the functionality that is required to enable efficient normsetting in an environment where the number of participants is very large and where the goals of the participants may be heterogeneous or even mutually exclusive. Our work in this area is part of the interdisciplinary research group "Internet-Mediated Cooperative Normsetting" at the Heinrich-Heine-University Düsseldorf.

Car-to-Car Communication

We envision a future where vehicles will be able to communicate with each other, forming a mobile distributed system. Our goal is to optimize this system in order to avoid accidents and minimize the waste of resources. We look at all levels of communication from the MAC layer up to the applications and at all communication technologies from IEEE802.11p to infrastructure-based solutions such as UMTS or LTE. Our methodology includes theoretical analysis, simulation, emulation, and real-world experiments. Some of the applications we are investigating are: traffic information systems, intersection warning, parking space management, and road construction support. We are actively participating in the simTD project and are a development member of the Car to Car Communication Consortium (C2C-CC) . Our work on peer-to-peer-based traffic information systems is funded by the Deutsche Forschungsgemeinschaft while we investigate improved beaconing schemes for safety applications in the context of the Automotive.NRW competition.

MAC Layer Security

Currently, ARP and DHCP are vulnerable to denial of service and spoofing attacks in large LANs. We work towards an integrated solution for MAC layer security that will prevent these attacks. A first version of our software for MAC layer security can be downloaded from the Cryptographic Link Layer project page.