For security and privacy management and enforcement purposes, various policy languages have been presented. We give an overview on 27 security and privacy policy languages and present a categorization framework for policy languages. We show how the current policy languages are represented in the framework and summarize our interpretation. We show up identified gaps and motivate for the adoption of policy languages for the specification of privacy-utility trade-off policies.
In urban sensing applications, participants carry mobile devices that collect sensor readings annotated with spatiotemporal information. However, such annotations put the participants' privacy at stake, as they can reveal their whereabouts and habits to the urban sensing campaign administrators. A solution to protect the participants' privacy is to apply the concept of k-anonymity. In this approach, the reported participants' locations are modified such that at least k-1 other participants appear to share the same location, and hence become indistinguishable from each other. In existing implementations of k-anonymity, the participants need to reveal their precise locations to either a third party or other participants in order to find k-1 other participants. As a result, the participants' location privacy may still be endangered in case of ill-intentioned third-party administrators and/or participants. We tackle this challenge by proposing a novel approach that supports the participants in their search for other participants without disclosing their exact locations to any other parties. To evaluate our approach, we conduct a threat analysis and study its feasibility by means of extensive simulations using a real-world dataset
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.