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Privacy protection mechanism for indoor positioning systems

Abstract:

Usageoflocation based services in indoor environments has grown as the popularity of smart devices has been extended. Location Based Services can be generally classified in Indoor LBS and Outdoor LBS. The most common and well-known Outdoor LBS mechanism is the Global Positioning System (GPS) because of its high coverage and accuracy in outdoor environments. However, GPS is not used for Indoor environments because its accuracy is downgraded dramatically due to the loss of signal strength when crossing the walls. Fingerprinting technique is considered one of the most popular indoor positioning system technology because of its highaccuracy. In this technique, the location informationof fixed devices (e.g. access points)is stored inthe serverto use it as the basis for calculating theposition of mobile devices of users. In this paper, a privacy protection mechanism for the server-based fingerprinting technique is presented. The proposed method protects users,not only from service provider, but also from external attackers. The proposed method only generates low overhead which rises its possibility to be implemented in real-time applications.