%0 Journal Article %T Trust and Privacy: Informal Ways to Assess Risk on Opportunistic Exchanges %A M¨¹ller Robertro Pereira Gon£¿alves %A Edson Dos Santos Moreira %A Luciana Andr¨¦ia Fondazzi Martimiano %J International Journal of Computer Science & Applications %D 2009 %I Technomathematics Research Foundation %U http://www.tmrfindia.org/ijcsa/v6i25.pdf