Marc Haase

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Publications (4)0 Total impact

  • Article: Time and Energy Efficient Service Discovery in Bluetooth
    Igor Sedov, Stephan Preu, Clemens Cap, Marc Haase, Dirk Timmermann
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    ABSTRACT: Key challenges in wireless mobile ad hoc networks are computational resource constraints, power limitations, and efficient service discovery techniques. The short range radio network technology Bluetooth suffers from long service discovery delays and high power consumption due to necessary connection establishment between discovering and discovered entity. For improving the efficiency of service discovery in Bluetooth networks we propose two new approaches. By leveraging the implicit broadcast capability of the Bluetooth inquiry procedure, we significantly reduce the service discovery time and hence lower the power consumption. Moreover, we enable the integration of resource limited devices which are incapable of taking part in service discovery themselves. Based on a performance evaluation and a comparison with the legacy Bluetooth Service Discovery Protocol (SDP), we present the benefits of our new approaches. I.
    05/2003;
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    Article: Citizen Digital Assistant (CDA) - Ein sicherer Zugang zu e-Government-Diensten.
    Nico Maibaum, Igor Sedov, Clemens H. Cap, Marc Haase, Dirk Timmermann
    Praxis der Informationsverarbeitung und Kommunikation. 01/2003; 26:21-25.
  • Conference Proceeding: Sicherheit bei spontan vernetzten mobilen Geräten.
    Dirk Timmermann, Clemens H. Cap, Marc Haase, Igor Sedov
    INFORMATIK 2003 - Innovative Informatikanwendungen, Band 1, Beiträge der 33. Jahrestagung der Gesellschaft für Informatik e.V. (GI), 29. September - 2. Oktober 2003 in Frankfurt am Main; 01/2003
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    Article: Hardware Security Concept for Spontaneous Network Integration of Mobile Devices
    Igor Sedov, Marc Haase, Clemens Cap, Dirk Timmermann
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    ABSTRACT: . In this article we introduce an architecture of a mobile device that enables safe and authenticated data-transmission in a spontaneously configured network environment. The usage of this device is illustrated by a number of examples. The hardware and software components are presented. Particular, we compare Bluetooth and Infrared (IrDA) wireless networking technology, explain the usage of biometrics recognition methods, clarify the choice of the cryptographic module and consider possible platforms for the integration of this trustworthy device into a ubiquitous environment. Subsequently a first realization of the concept will be explained. Referring to feasible possibilities of realization, di#erent attack scenarios together with appropriate solutions are considered. 1
    07/2001;
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