Michelle Madejski Maritza L. Johnson Steven M. Bellovin A study of privacy settings errors in an online social network. 340-345 2012 PerCom Workshops http://dx.doi.org/10.1109/PerComW.2012.6197507 conf/percom/2012w db/conf/percom/percomw2012.html#MadejskiJB12