@inproceedings{SchusterPaulKoenig, author = {Schuster, Franka and Paul, Andreas and K{\"o}nig, Hartmut}, title = {Towards Learning Normality for Anomaly Detection in Industrial Control Networks}, series = {Proceedings of the 7th IFIP WG 6.6 International Conference on Autonomous Infrastructure, Management, and Security (AIMS 2013), Barcelona, Spain, June 25-28, 2013}, booktitle = {Proceedings of the 7th IFIP WG 6.6 International Conference on Autonomous Infrastructure, Management, and Security (AIMS 2013), Barcelona, Spain, June 25-28, 2013}, publisher = {Heidleberg}, address = {Berlin [u.a.]}, isbn = {978-3-642-38997-9}, pages = {61 -- 72}, language = {en} } @inproceedings{RietzVogelSchusteretal., author = {Rietz, Ren{\´e} and Vogel, Michael and Schuster, Franka and K{\"o}nig, Hartmut}, title = {Parallelization of Network Intrusion Detection Systems under Attack Conditions}, series = {Detection of Intrusions and Malware, and Vulnerability Assessment, 11th International Conference, DIMVA 2014, Egham, UK, July 10-11, 2014}, booktitle = {Detection of Intrusions and Malware, and Vulnerability Assessment, 11th International Conference, DIMVA 2014, Egham, UK, July 10-11, 2014}, editor = {Dietrich, Sven}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-08508-1}, pages = {172 -- 191}, language = {en} } @inproceedings{MehnerKlauckKoenig, author = {Mehner, Stefan and Klauck, Ronny and K{\"o}nig, Hartmut}, title = {Location-independent fall detection with smartphone}, series = {The 6th International Conference on PErvasive Technologies Related to Assistive Environments, PETRA '13, Island of Rhodes, Greece, May 29-31, 2013}, booktitle = {The 6th International Conference on PErvasive Technologies Related to Assistive Environments, PETRA '13, Island of Rhodes, Greece, May 29-31, 2013}, editor = {Makedon, Fillia and Betke, Margrit and Seif El-Nasr, Magy and Maglogiannis, Ilias}, publisher = {ACM}, address = {New York, NY}, isbn = {978-1-4503-1973-7}, doi = {10.1145/2504335.2504346}, pages = {8}, abstract = {Due to demographic changes in developed industrial countries and a better medical care system, the number of elderly people who still live in their home environment is rapidly growing because there they feel more comfortable and independent as in a clinical environment or in a residential care home. The elderly often live alone and receive only irregular visits. Due to impaired physical skills the probability of falls significantly increases. The detection of falls is a crucial aspect in the care of elderly. Falls are often detected very late with severe consequential damages. There are existing approaches for automatic fall detection. They usually deploy special external devices. Elderly people often do not accept these devices because they expose their frailty. In this paper, we present a location-independent fall detection method implemented as a smartphone application for an inconspicuous use in nearly every situation of the daily life. The difficulty of our approach is in the low resolution range of integrated acceleration sensors and the limited energy supply of the smartphone. As solution, we apply a modular threshold-based algorithm which uses the acceleration sensor with moderate energy consumption. Its fall detection rate is in the average of current relevant research.}, language = {en} } @inproceedings{GaeblerKlauckPinketal., author = {G{\"a}bler, Jan and Klauck, Ronny and Pink, Mario and K{\"o}nig, Hartmut}, title = {uBeeMe - a Platform to Enable Mobile Collaborative Applications}, series = {Proceedings of the 9th International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom 2013), Austin, Texas, USA, October, 2013}, booktitle = {Proceedings of the 9th International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom 2013), Austin, Texas, USA, October, 2013}, publisher = {IEEE}, address = {Piscataway, NJ}, pages = {188 -- 196}, language = {en} } @misc{KoenigGaeblerKlaucketal., author = {K{\"o}nig, Hartmut and G{\"a}bler, Jan and Klauck, Ronny and Pink, Mario and Sprejz, Michael}, title = {uBeeMe - A Platform for Mobile Collaborative Applications}, series = {PIK - Praxis der Informationsverarbeitung und Kommunikation}, volume = {36}, journal = {PIK - Praxis der Informationsverarbeitung und Kommunikation}, number = {1}, issn = {0930-5157}, doi = {10.1515/pik-2012-0058}, pages = {S. 43}, language = {en} } @inproceedings{GaeblerKoenig, author = {G{\"a}bler, Jan and K{\"o}nig, Hartmut}, title = {Enhancing Group Communication Systems with Mobility Support}, series = {Proceedings of the 19th IEEE International Conference on Networks (ICON 2013), Singapore, December 2013}, booktitle = {Proceedings of the 19th IEEE International Conference on Networks (ICON 2013), Singapore, December 2013}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-4799-2085-3}, pages = {342 -- 347}, language = {en} } @inproceedings{PinkSprejzKoenig, author = {Pink, Mario and Sprejz, Michael and K{\"o}nig, Hartmut}, title = {A Coordinated Group Decision for Vertical Handovers in Heterogeneous Wireless Networks}, series = {2013 International Conference on MOBILe Wireless MiddleWARE, Operating Systems, and Applications, Bologna, Italy, November 11-13, 2013}, booktitle = {2013 International Conference on MOBILe Wireless MiddleWARE, Operating Systems, and Applications, Bologna, Italy, November 11-13, 2013}, publisher = {IEEE}, address = {Piscataway, NJ}, doi = {10.1109/Mobilware.2013.20}, pages = {130 -- 137}, abstract = {Cooperation and interactions of mobile users is a characteristic feature of mobile collaborative applications. The users are located in different mobile communication networks or move in or among them, respectively. This requires horizontal and vertical handovers. The latter is required when the networks use different network technologies. Usually each mobile device independently chooses the most appropriate network for its purposes to switch to. In group-oriented applications this may lead to an uncoordinated network selection and as consequence to increased energy consumption. In this paper, we present a distributed vertical handover decision algorithm that coordinates the selection of the network among the mobile devices in order to ensure an optimal quality of service for the collaborative application and a low energy consumption of the involved mobile devices. The network selection is based on the calculation of a group benefit for each alternative network using the Simple Additive Weighting (SAW) algorithm. The feasibility of the algorithm is evaluated regarding varying group sizes and resource requirements.}, language = {en} } @inproceedings{OpitzTodtenbergKoenig, author = {Opitz, Stefanie Judith and Todtenberg, Nicole and K{\"o}nig, Hartmut}, title = {Mobile bandwidth prediction in the context of emergency medical service}, series = {Proceedings of the 7th International Conference on PErvasive Technologies Related to Assistive Environments (PETRA '14)}, booktitle = {Proceedings of the 7th International Conference on PErvasive Technologies Related to Assistive Environments (PETRA '14)}, publisher = {ACM}, address = {New York, NY}, isbn = {978-1-4503-2746-6}, doi = {10.1145/2674396.2674411}, language = {en} } @misc{GaeblerKoenig, author = {G{\"a}bler, Jan and K{\"o}nig, Hartmut}, title = {Moversight: a group communication protocol for mobile scenarios}, series = {Telecommunication systems : modeling, analysis, design and managementversion}, volume = {61}, journal = {Telecommunication systems : modeling, analysis, design and managementversion}, number = {4}, issn = {1572-9451}, doi = {10.1007/s11235-015-0062-1}, pages = {695 -- 716}, abstract = {The increasing mobility of Internet users and the growing need to collaborate with staff travelling on business belong to the key characteristics of the future Internet. Mobile collaborative applications require novel schemes for group communication that actively support collaborations in wireless scenarios. An intrinsic problem of collaborations in wireless scenarios is the temporary connection loss with the group due to user mobility and network issues. Existing group communication protocols do not sufficiently support this situation. In this paper, we present a new peer-to-peer group communication protocol, called Moversight, that was specifically designed to support closed group cooperation in mobile environments with varying churn rates. It applies a new group communication paradigm, called mobile optimistic virtual synchrony, to handle churn-related peer failures. It enhances the virtual synchrony paradigm for mobile scenarios. The paper introduces the paradigm and describes the main protocol features of Moversight. Finally we present simulation results to demonstrate the applicability of the protocol.}, language = {en} } @inproceedings{DacierKarglKoenigetal., author = {Dacier, Marc C. and Kargl, Frank and K{\"o}nig, Hartmut and Valdes, Alfonso}, title = {Network Attack Detection and Defense: Securing Industrial Control Systems for Critical Infrastructures}, series = {Report from Dagstuhl Seminar 14292, 13. - 16. Juli 2014,}, booktitle = {Report from Dagstuhl Seminar 14292, 13. - 16. Juli 2014,}, publisher = {Dagstuhl Publishing}, address = {Schloss Dagstuhl, Wadern}, doi = {10.4230/DagRep.4.7.62}, pages = {62 -- 79}, abstract = {This report documents the program and the outcomes of Dagstuhl Seminar 14292 "Network Attack Detection and Defense: Securing Industrial Control Systems for Critical Infrastructures". The main objective of the seminar was to discuss new approaches and ideas for securing industrial control systems. It is the sequel of several previous Dagstuhl seminars: (1) the series "Network Attack Detection and Defense" held in 2008 and 2012, and (2) the Dagstuhl seminar "Securing Critical Infrastructures from Targeted Attacks", held in 2012. At the seminar, which brought together members from academia an industry, appropriate methods for detecting attacks on industrial control systems (ICSs) and for limiting the impact on the physical components were considered. A central question was whether and how reactive security mechanisms can be made more ICS- and process-aware. To some extent it seems possible to adopt existing security approaches from other areas (e. g., conventional networks, embedded systems, or sensor networks). The main question is whether adopting these approaches is sufficient to reach the desired level of security for ICSs. Detecting attacks to the physical components and appropriate reactions to attacks are new aspects that need to be considered as well. The main result of the seminar is a list of recommendations for future directions in ICS security that is presented in this report.}, language = {en} }