Gastvorträge 2014

Vortragender Dr. Jan Seedorf
Titel Binding Self-Certifying Names to Real-World Identities for Decentralised Assessment of Third-Party Messages
Zeit Mittwoch, 26.02.2014, 11.00 Uhr
Ort S2|02, Raum A102, Robert-Piloty-Gebäude
Hochschulstr. 10, 64283 Darmstadt
Self-certifying names provide the property that any entity in a distributed system can verify the binding between a corresponding public key and the self-certifying name without relying on a trusted third party. However, self-certifying names lack a binding with a corresponding real-world identity. In this talk, we describe a concrete mechanism for using a Web-of-Trust in conjunction with self-certifying names to provide this binding. We consider a decentralised scenario: fragmented (mobile) networks, where connectivity to centralized authentication entities and Web-of-Trust key-servers is not available. Our approach enables a particular functionality in this scenario: The assessment of messages from previously unknown third parties. Our analytical evaluation shows that – depending on the overall size of the Web-of-Trust and the average friend-degree among its users – it is feasible to apply our approach in a fully decentralised fashion at end user devices, or at least in a highly decentralized way at access network nodes.
Jan Seedorf is a Senior Researcher at NEC Laboratories Europe, working in the Real-Time Communications group. Previously, he has been working as a Research Assistant at the University of Hamburg where he conducted teaching and research in the Security in Distributed Systems Group (SVS). Jan received a Diploma degree in 2002 in computer science from the University of Hamburg, Germany, and a Dr. rer. nat. degree in 2013 from the University of Passau. His research interests include real-time communications, content distribution technologies, highly decentralized/P2P systems, and security.