Robert W. Reeder Lujo Bauer Lorrie Faith Cranor Michael K. Reiter Kelli Bacon Keisha How Heather Strong Expandable grids for visualizing and authoring computer security policies. 1473-1482 2008 CHI http://doi.acm.org/10.1145/1357054.1357285 conf/chi/2008 db/conf/chi/chi2008.html#ReederBCRBHS08