Due to the ability of cell phone providers to use cell phone towers to pinpoint users’ locations, federal E911 requirements, the increasing popularity of GPS-capabilities in cellular phones, and the rise of cellular phones for Internet use, a plethora of new applications have been developed...

A number of mobile applications have emerged that allow users to locate one another. However, people have expressed concerns about the privacy implications associated with this class of software, suggesting that broad adoption may only happen to the extent that these concerns are adequately...

A proper security architecture is an essential part of implementing robust and reliable networked applications. Security patterns have shown how reoccurring problems can be best solved with proven solutions. However, while they are critical for ensuring the confidentiality, integrity and...

A number of mobile applications have emerged that allow users to locate one another. However, people have expressed concerns about the privacy implications associated with this class of software, suggesting that broad adoption may only happen to the extent that these concerns are adequately...

Social networking sites such as Facebook and MySpace thrive on the exchange of personal content such as pictures and activities. These sites are discovering that people's privacy preferences are very rich and diverse. In theory, providing users with more expressive settings to spec- ify their...

This paper presents a study of obfuscation practices in location-sharing systems. The study shows that users have relatively complex preferences that depend on the recipient of the location, the time of the request and location. The preferences also require multiple levels of obfuscation...

While prior studies have provided us with an initial understanding of people's location-sharing privacy preferences, they have been limited to Western countries and have not investigated the impact of the granularity of location disclosures on people?s privacy preferences. We report findings of...

Little research exists measuring the effectiveness of privacy legislation as compared to self-regulation. As policy makers, advocates and industry groups debate new privacy legislation, empirical research on the effectiveness of existing privacy legislation is needed to help inform the debate.We...

We used an iterative design process to develop a privacy label that presents to consumers the ways organizations collect, use, and share personal information. Many surveys have shown that consumers are concerned about online privacy, yet current mechanisms to present website privacy policies...