One of the main privacy concerns of users when submitting their data to an organization is that their data will be used only for the specified purposes. Although privacy policies can specify the purpose, enforcing such policies remains a challenge. In ...

We give a practical polling protocol that is immune to tampering by either the pollster or the responder. It preserves responders' privacy in the manner of Warner's Randomized Response Technique, is easily understood without any knowledge of ...

The amount of contextual data collected, stored, mined, and shared is increasing exponentially. Street cameras, credit card transactions, chat and Twitter logs, e-mail, web site visits, phone logs and recordings, social networking sites, all are ...

Storage of personal information by service providers risks privacy loss from data breaches. Our prior work on minimal disclosure credentials presented a mechanism to control the dissemination of personal information. In that work, personal data was ...

Reputation systems are popular tools to evaluate the trustworthiness of an unknown party before a transaction, but the reputation score can greatly impact the rated subject, such that it might be inclined to suppress negative ratings. In order to elicit ...

RFID can be used for a variety of applications, e.g., to conveniently pay for public transportation. However, achieving security and privacy of payment is challenging due to the extreme resource restrictions of RFID tags. In this paper, we propose PSP --...

In Tor, a bridge is a client node that volunteers to help censored users access Tor by serving as an unlisted, first-hop relay. Since bridging is voluntary, the success of this circumvention mechanism depends critically on the willingness of clients to ...

We propose a novel framework for measuring and evaluating location privacy preserving mechanisms in mobile wireless networks. Within this framework, we first present a formal model of the system, which provides an efficient representation of the network ...

Prior work in psychology shows that introspection inhibits intuition: asking human users to analyze judgements they make can cause them to be quantitatively worse at making those judgments. In this paper, we explore whether this seemingly contradictory ...

It is my great pleasure to welcome you to the 8th ACM Workshop on Privacy in the Electronic Society -- WPES'09, held in association with the ACM Computer and Communications Security Conference, November 9, 2009, in Chicago, IL (USA).

Thanks to the ...