Vitamin C for your smartphone: the SKIMS approach for cooperativeand lightweight security at mobiles. - Matthias Wählisch; Sebastian Trapp; Jochen H. Schiller; Benjamin Jochheim; Theodor Nolte; Thomas C. Schmidt; Osman Ugus; Dirk Westhoff; Martin Kutscher; Matthias Küster; Christian Keil; Jochen Schönfelder (SIGCOMM, 2012)