INFORMATION REVELATION AND PRIVACY IN ONLINE SOCIAL NETWORKS (THE FACEBOOK CASE) Rachid Hamcha IMM

STRUCTURE Introduction Introduction Information Revelation And On- Line Social Networking Information Revelation And On- Line Social Networking The Facebook.com The Facebook.com Privacy implications Privacy implications Conclusions Conclusions

INTRODUCTION Evolution of online networking Evolution of online networking

INFORMATION REVELATION AND ON- LINE SOCIAL NETWORKING Social Network Theory and Privacy Social Network Theory and Privacy Privacy Implications Privacy Implications

THE FACEBOOK.COM CMU 4540 profiles CMU 4540 profiles

THE FACEBOOK.COM Types and Amount of Information Disclosed Types and Amount of Information Disclosed 90.8% ->image 90.8% ->image 87.8% ->reveal their birth date 87.8% ->reveal their birth date 39.9% list a phone number 39.9% list a phone number Summer Job and political preference very low Summer Job and political preference very low

THE FACEBOOK.COM Data Validity and Data Identi fi ability Data Validity and Data Identi fi ability Pro fi le Names Pro fi le Names Identi fi ability of Images on Pro fi le Identi fi ability of Images on Pro fi le Friends Networks Friends Networks

THE FACEBOOK.COM Data Visibility and Privacy Preferences Data Visibility and Privacy Preferences Pro fi le Searchability Pro fi le Searchability Pro fi le Visibility Pro fi le Visibility Facebook Data Access Facebook Data Access

PRIVACY IMPLICATIONS Stalking Stalking Building a Digital Dossier Building a Digital Dossier Fragile Privacy Protection Fragile Privacy Protection Fake Address Fake Address Manipulating Users Manipulating Users Advanced Search Features Advanced Search Features

CONCLUSIONS Large amounts of personal information in an online social network Large amounts of personal information in an online social network Unconcerned to privacy risks Unconcerned to privacy risks Limiting privacy preferences are hardly used Limiting privacy preferences are hardly used Only a small number of members change the default privacy settings Only a small number of members change the default privacy settings Based on the information they provide online, users expose themselves to various physical and cyber risks Based on the information they provide online, users expose themselves to various physical and cyber risks