Privacy is a complex social process that will persist in one form or another as a fundamental feature of the substrate into which ubicomp is threaded. To better understand the privacy issues related to the use of ubicomp we place our efforts in understanding the contextual information relevant to privacy and how their interplay shapes the perception of privacy in a particular setting, such as a...

User studies were conducted to explore the different conditions and constraints that affect people’s perceived privacy in a networked home environment. Context-aware applications for an extended home environment provided the setting and conditions for inducing privacy-sensitive situations. A presence detection and sharing system was placed in people’s homes to conduct a longitudinal field test ...

With the recent surge of social networks like Facebook, new forms of recommendations have become possible – personalized recommendations of ads, content, and even new social and product connections based on one’s social interactions. In this paper, we study whether “social recommendations”, or recommendations that utilize a user’s social network, can be made without disclosing sensitive links b...

Users share massive amounts of personal information and opinion with each other and different service providers every day. In such an interconnected setting, the privacy of individual users is bound to be affected by the decisions of others, giving rise to the phenomenon which we term as interdependent privacy. In this paper we define online privacy interdependence, show its existence through a...

User studies were conducted to explore the different conditions and constraints that affect people’s perceived privacy in a networked home environment. Context-aware applications for an extended home environment provided the setting and conditions for inducing privacy-sensitive situations. A presence detection and sharing system was placed in people’s homes to conduct a longitudinal field test ...

Privacy in travel refers to the way people manage their personal travel information and their willingness to share this information with others. Travel privacy concerns affect the amount and type of information people are willing to share within social networks, before or after their trip. Our study focuses on privacy and sharing concerns regarding business travel in an enterprise setting. We b...

Linear regression amounts to estimating a linear model that maps features (e.g., age or gender) to corresponding data (e.g., the answer to a survey or the outcome of a medical exam). It is a ubiquitous tool in experimental sciences. We study a setting in which features are public but the data is private information. While the estimation of the linear model may be useful to participating individ...

We consider the online setting where a user would like to continuously release a time-series of data that is correlated with his private data, to a service provider in the hope of deriving some utility. Due to correlations, the continual observation of the released time-series puts the user at risk of inference of his private data by an adversary. To protect the user from inference attacks on h...

Privacy is one of the main societal concerns raised by critics of the uncontrolled growth and spread of information technology in developed societies. The purpose of this paper is to propose a privacy compliance engine that takes email messages as input and filters those that violate the privacy rules of the organization in which it is deployed. Our system includes two main parts: an informatio...

This paper critically evaluates the privacy aspects of Web Browsers that implement the W3C’s Geolocation Specification. This paper concludes by making a number of recommendations that may be applicable to browser vendors and standards-setting bodies, such as the W3C.