• Distributed Systems

    Centralization of data simplifies many things. But as we have learned from recent data breaches it also simplifies the mass download and abuse of this data. In the interest of society it therefore has to become the duty of computer scientists to ensure that data can be kept as much as possible under the control of the subjects of the data. We believe that federated distributed systems are the key to achieving this goal, as they can be made to share data only on an as-needed basis, as defined by the involved individuals. Through mutual support and coordination, these distributed systems can gain many of the advantages of centralized systems, such as defense against malicious activities.




Secure and Private Collaboration through DNS

The mDNS-SD Privacy Extension replaces many multicast packets by unicast packets sent to pre-paired devices only, thus not only distributing less privacy-sensitive data in the network, but also reducing the amount of broadcast traffic that uses a considerable amount of resources on modern wireless networks.

[Master] Design and Analysis of a secure multi-party communication protocol

In the past years digital communication became an important aspect in every day life. Everything is shared and discussed in groups of friends, family or business part- ners without a proper way to protect that information. This master thesis introduces the first secure robust multi-party communication protocol which mimics a physical conversation with the help of a Diffie-Hellman key tree and social behaviours. Robust- ness against offline group members is reached by taking advantage of...

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