Auflistung nach Schlagwort "WLAN"
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- KonferenzbeitragLocation Based Service Portale auf Basis von Network Integrated Applications(Workshop Gemeinschaften in Neuen Medien (GeNeMe) 2008, 2008) Benze, Jörg
- TextdokumentPotential analysis for the detection of attacks on wireless networks using the Wireless Intrusion Detection System Nzyme(INFORMATIK 2022, 2022) Eisenhut,Maximilian; Honekamp,WilfriedDue to the flexibility and low cost of acquisition compared to wired network connections, wireless networks continue to proliferate. Due to this increasing number and the characteristics of a shared medium, it offers potential attackers a suitable platform to easily gain access to diverse network types. To this end, the range of specialised hardware and software for attacking wireless networks is constantly evolving. Information on the location and other parameters of wireless networks is also documented and updated online in a largely automated manner. Particularly in the economic as well as in the public environment, a special need can thus arise to detect attacks, identify attackers and initiate countermeasures on the basis of this information. This paper describes the evaluation of the possibilities offered by the open-source Wireless Intrusion Detection System (WIDS) Nzyme. For this purpose, the messages that occur during different attacks were examined. Furthermore, real data was recorded and evaluated based on the parameters from the test attacks to draw conclusions about the type and frequency of attacks. The ratio between legitimate reports and false alarms was also determined. Test attacks were successfully detected and could be assigned to possible attacks. Real data was recorded at three locations and compared with the patterns from the test attacks. The evaluation shows that the rate of false alarms in real operations is unacceptable, at over 27%. The causes for this are mostly misconfigurations and atmospheric disturbances. The study further shows, that combined alarm messages allow conclusions to be drawn about the type of attack carried out and thus the number of false alarms can be reduced. The effort and benefit of a WIDS are currently not yet in a meaningful relationship. Nevertheless, use and further development are recommended, taking these circumstances into account.
- ZeitschriftenartikelShared WiFi-Communities – User Generated Infrastructure am Beispiel von FON(Wirtschaftsinformatik: Vol. 50, No. 6, 2008) Becker, Jan U.; Clement, Michel; Schaedel, UteShared WiFi-Communities entstehen dadurch, dass Nutzer ihren privaten WLAN-Anschluss für andere Nutzer öffnen und im Gegenzug bei anderen Mitgliedern der Community online gehen können. Das Angebot von WLAN-Kapazität und die Nachfrage nach WLAN werden in der Regel durch eine zentrale Instanz koordiniert, sodass Nachfrager gezielt einen Anbieter in der Community finden können. Es haben sich schon erste Unternehmen im Markt etabliert, die Shared WiFi-Communities kommerziell betreiben. Internationaler Marktführer ist FON mit etwa 170.000 Hotspots weltweit.Für den ökonomischen Erfolg von Shared WiFi-Communities (wie z. B. FON) ist die Adoption eines speziellen Routers oder die Modifikation der bestehenden WLAN-Infrastruktur notwendig. Zudem ist es erforderlich, dass die Nutzer ihre WLAN-Kapazität möglichst breitbandig und vor allem dauerhaft der Community zur Verfügung stellen. Nur so können Netzeffekte zu einer dauerhaften Nutzensteigerung führen.Auf der Basis einer Befragung von 268 deutschen FON-Nutzern wird deutlich, dass die Community eine hohe Kohäsion aufweist. So verändern die Nutzer kaum die Standardeinstellungen für die freigegebene Bandbreite des Routers. Zudem stellt die Mehrzahl der Befragten ihr WLAN nahezu 24 Stunden am Tag zur Verfügung.Trotz der Möglichkeit, mit der Freigabe von WLAN-Kapazitäten Einnahmen zu erzielen, bieten die Mitglieder der Community den WLAN-Zugang nicht mit rein ökonomischer Zielsetzung an. Obgleich das Marktpotenzial von Shared WiFi-Communities enorm erscheint, existieren rechtliche Hindernisse und technische Einschränkungen, die die Penetration erschweren.AbstractShared WiFi-Communities emerge when users share their private Wireless Fidelity with others and in return get free internet access via community members’ internet connection. Supply of wireless capacity and demand for WLAN usually are coordinated by a central authority therewith users can find specific hosts within the community.Initial players that conduct commercial WiFi-Communities established their position in the market. The international market leader with 170,000 hotspots worldwide is FON. The commercial success of shared WiFi-communities (e.g. FON) depends on the adoption of a special router or modifications of the existing WLAN-infrastructure. More importantly it is essential that users permanently offer broadband capacity to the community. Only then net effects can durably generate enhanced usage benefits.A survey of 268 German FON users reveals that the community shows a high level of cohesion. Users barely vary from the default setting concerning shared bandwidth of the router. Additionally most interviewees offer their WLAN 24 hours a day. Despite the possibility of earning money with the wireless capacity most users do not offer bandwidth with a purely economic ambition. Although the market potential of shared WiFi communities appears tremendous legal obstructions and technical restraints exacerbate penetration.