Tiptoe is a private web search engine that allows clients to search over hundreds of millions
of documents, while revealing no information about their search query to the search engine's …

The increasing popularity of social media has attracted a huge number of people to
participate in numerous activities on a daily basis. This results in tremendous amounts of …

The total variation distance is proposed as a privacy measure in an information disclosure
scenario when the goal is to reveal some information about available data in return of utility …

We describe the design, implementation, and evaluation of Popcorn, a media delivery
system that hides clients' consumption (even from the content distributor). Popcorn relies on …

Obfuscation-based private web search (OB-PWS) solutions allow users to search for
information in the Internet while concealing their interests. The basic privacy mechanism in …

Recommendation systems and content-filtering approaches based on annotations and
ratings essentially rely on users expressing their preferences and interests through their …

Cardinality estimators like HyperLogLog are sketching algorithms that estimate the number
of distinct elements in a large multiset. Their use in privacy-sensitive contexts raises the …

Personalized information systems are information-filtering systems that endeavor to tailor
information-exchange functionality to the specific interests of their users. The ability of these …

Web search queries reveal extensive information about users' personal lives to the search
engines and Internet eavesdroppers. Obfuscating search queries through adding dummy …

Very recently, we are witnessing the emergence of a number of start-ups that enables
individuals to sell their private data directly to brokers and businesses. While this new …