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Usernames are ubiquitously used for identification and authentication purposes on web services and the Internet at large, ranging from the local-part of email addresses to identifiers in social networks. Usernames are generally alphanumerical strings ...

Businesses, governments, and individuals leak confidential information, both accidentally and maliciously, at tremendous cost in money, privacy, national security, and reputation. Several security software vendors now offer "data loss prevention" (DLP) ...

Detection of malicious traffic in the Internet would be much easier if ISP networks shared their traffic traces. Unfortunately, state-ofthe-art anomaly detection algorithms require detailed traffic information which is considered extremely private by ...

Mobile users expose their location to potentially untrusted entities by using location-based services. Based on the frequency of location exposure in these applications, we divide them into two main types: Continuous and Sporadic. These two location ...

Location-Sharing-Based Services (LSBS) complement Location-Based Services by using locations from a group of users, and not just individuals, to provide some contextualized service based on the locations in the group. However, there are growing concerns ...

In this work, we demonstrate the practicality of people tracking by means of physical-layer fingerprints of RFID tags that they carry. We build a portable low-cost USRP-based RFID fingerprinter and we show, over a set of 210 EPC C1G2 tags, that this ...

We give a critical analysis of the system-wide anonymity metric of Edman et al. [3], which is based on the permanent value of a doubly-stochastic matrix. By providing an intuitive understanding of the permanent of such a matrix, we show that a metric ...

Tor is one of the most widely used privacy enhancing technologies for achieving online anonymity and resisting censorship. While conventional wisdom dictates that the level of anonymity offered by Tor increases as its user base grows, the most ...

I2P is one of the most widely used anonymizing Peer-to-Peer networks on the Internet today. Like Tor, it uses onion routing to build tunnels between peers as the basis for providing anonymous communication channels. Unlike Tor, I2P integrates a range of ...

The widespread deployment of smart meters for the modernisation of the electricity distribution network, but also for gas and water consumption, has been associated with privacy concerns due to the potentially large number of measurements that reflect ...

Traditional electricity meters are replaced by Smart Meters in customers' households. Smart Meters collect fine-grained utility consumption profiles from customers, which in turn enables the introduction of dynamic, time-of-use tariffs. However, the ...

Social network sites (SNS) allow users to share information with friends, family, and other contacts. However, current SNS sites such as Facebook or Twitter assume that users trust SNS providers with the access control of their data. In this paper we ...

For over fifty years, "record linkage" procedures have been refined to integrate data in the face of typographical and semantic errors. These procedures are traditionally performed over personal identifiers (e.g., names), but in modern decentralized ...

An anonymous credential system allows the user to convince a verifier of the possession of a certificate issued by the issuing authority anonymously. One of the applications is the privacy-enhancing electronic ID (eID). A previously proposed anonymous ...

Private matching solutions allow two parties to find common data elements over their own datasets without revealing any additional private information. We propose a new concept involving an intermediate entity in the private matching process: we ...