Abstract
Abstract Today there are many location technologies providing people or object location. However, location privacy must be ensured before providing widely disseminated location services. Privacy rules may depend not only on the identity of the requester, but also on past events such as the places visited by the person being located, or previous location queries. Therefore, location systems must support the specification and enforcement of security policies (including history-based) allowing users to specify when, how and whom may know their location. We propose a middleware platform named Jano [Jano (or JANVS in latin) is the god of doors and gates in the roman mythology. He is usually depicted with two or four faces turning in opposite directions.] supporting both pull and push location requests while enforcing configurable security policies. Policies are specified using the Security Policy Language, SPL, facilitating the use of well-known security models. In particular, Jano supports history-based policies applied to person’s or object’s location. Jano implementation integrates several location technologies (e.g. GPS, RFID, etc.) and deals with the related heterogeneity aspects. It provides a web-based interface that facilitates policy specification, and its evaluation shows good performance, embodying a number of optimizations regarding bandwidth, process and storage savings.
Highlights
Being able to locate someone or something has been a need over the times
Regarding the use case and applications, these were chosen as they provide two usage scenarios that illustrate real user needs in terms of location privacy policies, and are related to other scenarios described in the literature [29]
Users are willing to share their location to third parties and so we focus on control and limitation in the disclosure of location privacy
Summary
Being able to locate someone or something has been a need over the times. Today, as in the past, the reasons why location is needed are multiple. As a matter of fact, privacy is a necessary condition for freedom, in the sense that where we are and who we are with, is related to what we are doing. The possibility of being located by others raises the question: “Who, and under what condition, may someone be allowed to locate me or know I am nearby?”. This can be as simple as restricting a time interval; for example: “Bob can only locate Alice between 10 a.m. and 4 p.m.”. The decision is based on the present situation and on past events. In addition to the previous situation (e.g., knowing the location of Alice) there are cases in which it is important
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