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Auflistung nach Autor:in "Ebinger, Peter"

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  • Konferenzbeitrag
    Challenges for the implementation and revision of international biometric standards demonstrated by the example of face image data
    (BIOSIG 2009: biometrics and electronic signatures, 2009) Ebinger, Peter; Neves, Margarida Castro; Salamon, René; Bausinger, Oliver
    Travel documents such as the electronic passport (ePass) ensure that each person can be uniquely identified by a single document. The development of new ePass security chip technologies allows for the inclusion of biometric properties in the data carrier of the ePass. The International Civil Aviation Organization (ICAO) has determined a personal photograph as being the interoperable feature for all global travel documents; ICAO [Gro04] regulations reference quality requirements for facial images as defined in ISO standard ISO/IEC 19794-5 [Intb]. Project FIReBIRDs goal is to prepare an international facial image database for conformity tests based on ISO/IEC 19794-5 [Intb], to analyze the requirements in the regulating documents, and to develop suggestions for adaptations and extensions of these standards. The FIReBIRD database shall provide a well-defined ground truth for level 3 conformance testing. For this purpose the specifications in the standard were thoroughly analyzed and in some parts refined to allow for a precise definition of ground truth. We show with two examples that there might be a defined common-sense definition for some parameters, but they are not measurable and their specification is not scientifically founded: the definition of full frontal view and the definition of eye and hair colors. Our results show that specifications and requirements should always be checked for necessity, practicability and usability and that a continued review and revision of biometric standards is necessary.
  • Konferenzbeitrag
    International Database of Facial Images for Performance and ISO/IEC 19794-5 Conformance Tests
    (BIOSIG 2008: Biometrics and Electronic Signatures, 2008) Ebinger, Peter; Castro Neves, Margarida; Salamon, René; Seibert, Helmut
    Digital face images and fingerprint images are included in all newly issued EU passports [Bus06]. Face images stored within electronic passports (ePass) have to conform to ISO/IEC 19794-5 [Inta] which defines a number of quality requirements for facial image data. A software application (QS Software) is used to verify photographic image properties (pose, head/image size, height-to-page ratio, etc.) as well as setup properties (color depth, contrast, brightness, etc.) [Intb]. To ensure reliability and reproducibility of automated facial image processing systems it is necessary to assess the quality of existing software packages. To this end a database of facial image data would be of significant value as a testing base [HSM06]. The goal for project series FIReBIRD (Facial Image REcognition Benchmark In- cluding Realistic Disturbances) is to establish a database of facial images that can be used worldwide for compliance and performance testing and quality verification based on ISO standards. FIReBIRD will be conducted in close cooperation of Fraunhofer IGD and the German Federal Office for Information Security (BSI) and will be carried out in parallel and in international cooperation with the U.S. National Institute of Stan- dards and Technology (NIST) and the British National Physical Laboratory (NPL). After successful completion of a conceptual framework the international database will be built. This facial image database will consist of distinct data sets used by two separate user groups for two different purposes: public test data that is available for algorithm developers and non-public test data for system evaluation accessible only to authorized organizations such as BSI/Fraunhofer IGD, NPL and NIST.
  • Konferenzbeitrag
    Using Localization Information for Attack Detection in Mobile Ad hoc Networks
    (SICHERHEIT 2008 – Sicherheit, Schutz und Zuverlässigkeit. Beiträge der 4. Jahrestagung des Fachbereichs Sicherheit der Gesellschaft für Informatik e.V. (GI), 2008) Ebinger, Peter; Sommer, Martin
    This paper examines how positioning data, radio signal characteristics and routing information can be used to detect active attacks (such as black hole attacks) in mobile ad hoc networks (MANETs). Various data sets are analysed and compared to check their consistency in order to detect anomalies that might indicate attack. Direct positioning data (such as GPS coordinates) and other sources of information (such as radio signal strength) are taken into account from which conclusions can be drawn about the distance between individual nodes. Expected communication relationships derived from node localization are compared to the actual network connectivity graph given by the routing tables. This comparison can detect suspicious properties (divergent values) which could indicate an attack in progress. We propose methods for MANET intrusion detection which allow the detection of active attacks based on different sensor data related to node localization. The typical state of this sensor data during normal network operation is compared to measured results during an active attack. The underlying protocol of the analyzed MANET is Ad hoc On-demand Distance Vector Routing (AODV) and proposed concepts are verified using the network simulator JiST/MobNet. Simulation results show that the proposed IDS components detect can attacks on a MANET with high probability for various set-ups.