Handling user-defined private contexts for location privacy in LBS

e present a privacy-preserving framework for the protection of location from potentially untrustworthy location providers (LP), oering geolocation services to LBS subscribers, across indoor and outdoor settings. This framework, called Placeprint, is built on the metaphor of private place[1]. A private place is a user-de ned spatial context which belongs to the personal sphere of an individual, e.g. home. In Placeprint, users equipped with commodity devices, can be geolocated in private places without revealing to the LP their presence. Moreover users can specify context-based privacy rules to forestall the disclosure of private places also to LBS providers. The ultimate goal is to provide users with the capability of exercising exible control over the disclosure of the position to both LP and LBS provider

Privacy-aware geolocation interfaces for volunteered geography : a case study

The standard W3C Geolocation API can signi cantly facilitate geospatial data collection as it provides a simple set of operations for requesting geolocation services across indoor and outdoor spaces through the Web. Importantly, this API is privacy-aware in that it provides a basic privacy mechanism for requesting the user's consent to location acquisition. In this paper we address the question on whether this privacy mechanism is su cient to conduct a project for the collection of geospatial content, in compliance with privacy laws. The question is of practical relevance as the use of geolocation standards in line with privacy regulations would make the development of volunteered geography projects easier. In this paper we present an interdisciplinary analysis spanning across technology and law, and driven by an application case. We show the limitations of this API and discuss a possible extension in line with privacy norms. Although we con ne ourselves to consider European regulations, we believe that this study can be of more general concern