Abstract: On the basis of trust attack graph, the object-oriented trust attack Petri net model was put forward, the dynamic model described the attack behaviors among components of trust entity object. By introducing the object Petri net, the trust attack relations between trust entity objects and components were shown in the Petri net, simulating the collaborative work between the components. According to the new trust relation reconstruction rules, a trust attack path inference algorithm was proposed to make the attacker knowing the changes of harmfulness when attacking the components, thus the attacker could decide the attack direction. The maximal threat path which could arrive at an attack goal could be searched out. An experiment shows that the model can describe the dynamic trust entity object attack relations between components, and accurately find the trust attack path in the trust environment.

Key words: trust, trust attack, object Petri net, trust relation reconstruction, trust attack path