Increasing Transparency and Privacy for Online Social Network Users - USEMP Value Model, Scoring Framework and Legal. - Adrian Popescu 001; Mireille Hildebrandt; Jonas Breuer; Laurence Claeys; Symeon Papadopoulos; Georgios Petkos; Theodoros Michalareas; David Lund; Rob Heyman; Shenja van der Graaf; Etienne Gadeski; Hervé Le Borgne; et al. (APF, 2015)