Abstract. Online social networks such as Friendster, MySpace, or the Facebook have experienced exponential growth in membership in recent years. These networks offer attractive means for interaction and communication, but also raise privacy and security concerns. In this study we survey a representative sample of the members of the Facebook (a social network for colleges and high schools) at a US academic institution, and compare the survey data to information retrieved from the network itself. We look for underlying demographic or behavioral differences between the communities of the network's members and non members; we analyze the impact of privacy concerns on members' behavior; we compare members' stated attitudes with actual behavior; and we document the changes in behavior subsequent to privacy-related information exposure. We find that an individual's privacy concerns are only a weak predictor of his membership to the network. Also privacy concerned individuals join the network and reveal great amounts of personal information. Some manage their privacy concerns by trusting their ability to control the information they provide and the external access to it. However, we find significant misconceptions among some members about the online community's reach and the visibility of their profiles.
In 2006 Acquisti and Gross REF further surveyed 294 Facebook users at CMU and compared the survey results to the information retrieved from Facebook.
Imagined Communities: Awareness, Information Sharing, and Privacy on the Facebook
Privacy Enhancing Technologies
Computer Science