Esther Palomar Juan M. Estévez-Tapiador Julio César Hernández Castro Arturo Ribagorda Dealing with Sporadic Strangers, or the (Un)Suitability of Trust for Mobile P2P Security. 779-783 2007 conf/dexaw/2007 DEXA Workshops http://doi.ieeecomputersociety.org/10.1109/DEXA.2007.57 db/conf/dexaw/dexaw2007.html#PalomarECR07