Trust Representation 4 Denote opinion ar=(bB, dr, ur)to represent the belief from node A to node b Uncertainty PB - Probability that node a believe in node B Probability that node a disbelieve o(40.10.5) 0 In node B Probability of node as uncertainty about b's trustworthiness Disbelief A B +datum=1 B Probability axis 0.5 a The relative atomicity ag is set to 0.5 in our application The probability expectation E(Or)=bg +ag ur 14 May 29, 2009 CSE CUHK14 May 29, 2009 CSE CUHK Trust Representation ◆ Denote opinion to represent the belief from node A to node B ◼ -- Probability that node A believe in node B ◼ -- Probability that node A disbelieve in node B ◼ -- Probability of node A’s uncertainty about B’s trustworthiness ◼ ◼ The relative atomicity is set to 0.5 in our application. ◼ The probability expectation A B b ( , , ) A B A B A B A B   b d u A B d A B u + + =1 A B A B A bB d u A aB 0 0 0 1 1 1 (0.4,0.1,0.5) A B 0.5 Disbelief Uncertainty Belief 0 0.5 1 0.5 0.5 Probability axis A B a ( ) A E B A B A B A B A E(B ) = b + a u