Robert W. Reeder Patrick Gage Kelley Aleecia M. McDonald Lorrie Faith Cranor A user study of the expandable grid applied to P3P privacy policy visualization. 45-54 2008 WPES http://doi.acm.org/10.1145/1456403.1456413 conf/wpes/2008 db/conf/wpes/wpes2008.html#ReederKMC08