Social Networks: Facebook “Facebook Grows Up” by Steven Levy “Information Revelation and Privacy in Online Social Networks (The Facebook Case)” by Ralph Gross and Alessandro Acquisti By: Justin Wilkerson

History of Facebook Founded by Harvard student Mark Zuckerberg, in February 2004 In August 2005 thefacebook was officially called Facebook, and the domain Facebook.com was purchased for $200,000 Only could access Facebook if you had a valid college (high school students granted access September 2005) September 11,2006, open enrollment policy Just like Google, Facebook generates revenue through advertisements

Online Social Networks Dates back to 1960’s Social software Weblog groups 9 categories: business (i.e. GoingProfessional.com), common interests (i.e. BookCrossing.com), dating (EHarmony.com), friends (i.e. Myspace.com), pets (i.e. Catster.com), photos (i.e. Flickr.com), face-to-face facilitation (i.e. Meetup.com), MoSoSo (mobile-social-software), edge cases social networking plus (i.e. Insiderpages.com) Sites offer core features like “Profiles” and the ability for users to be contacted or contact others

Information Revelation Social networking sites share the basic purpose of online communication, but goals and usage patterns are different from each other The use of real names of its users is encouraged by many of the sites like Facebook, but sites like MySpace most users do not use their real names all the time

Cont. Information can be revealed often by hobbies and common interests –Semi-public info. Such as previous schools and work places –Private Info. Like drinking and or smoking habits –And open-ended entries

Cont. 2 Visibility is a high variable on online social networks –Some sites allow you to view other users profiles –Some sites allow users to limit what others see –Such Visibility is privacy controls are updated each day, like on Facebook

Cont. 3 Across these different sites, more and more users are giving out personal information –P–Personal addresses AIM, Yahoo, etc. –P–Phone numbers –C–Current Residence

The Social Network Theory and Privacy Relationship between a person’s social network and privacy can be multi-factored In some cases, users want their info. to circulate throughout smaller online communities and not to strangers In others, users will be willing to open their private info. to strangers, but to the ones they better than others

The Facebook.com Many of social networking sites are of college age –College oriented social networks because these networks offer wealth of personal data of potentially great value to outside viewers and critics –Since many college social networks require college accounts, to increase to sense of trust and intimacy throughout the online community

The Study June 2005, Gross and Acquisti downloaded 4540 Carnegie Mellon University (CMU) Facebook profiles Demographics: –73.7% were under-grads –60.4% male versus 39.2% female –95.6% of users fall into the age range

Types and Amounts of Info. Disclosed

Data Visibility and Privacy Preferences Facebook gives users opportunity to control their own searchability and visibility –“Sociological theories have noted how an individual may selectively disclose personal info. To others in order to establish some different degrees of trust and intimacy with them” –Facebook Data Access

Privacy Implications Privacy Features are provided by many social networks, especially with Facebook, but users rarely use these features The main result of users not taking advantage of the privacy outlines, is “stalking”, 860 profiles revealed their current residence, at least 2 classes they were attending, and phone number –Most of the of online networks are stalked using AOL instant messenger (AIM), because AIM allows users to add buddies/friends without any notification. 77.7% of all these studied profiles contained an AIM screen name.

Cont. Re-Identification “Data re-identification typically deals with the linkage of datasets without explicit identifiers such as name and address to datasets with explicit identifiers through common attributes.” –A large number of the US population can be re- identified using a zip code, gender, and date of birth. –45.8% of Facebook users list their birthday, current residence, and gender, making them able to be re- identified. –By this info. being in users profiles, hackers can take their birth date, zip code, and so forth, to estimate what their Social Security Number is.

Conclusion Facebook has become the social network king… and is about to put itself on the in the stock market world. There are many risks to using Facebook (i.e. stalking) Studies show that there is a lot of private info. Leakage using Facebook as well as other social networks