A new dynamic contract net protocol

CPN as object-oriented modeling tools, it is combined with undeniable agreement and trust of the update strategy, which is given a safe and intuitive model. When the given task managers are not only based on the cost of implementing the tasks in the tender selection of contractors, but a combination of trust, the implementation of utility computing tasks, whereby the decision does the task assigned. In the communication process, the introduction of repudiation protocol is collected by the participating parties and the preservation of evidence. Task is completed, and the use of trust updates the policy. If any party objects, he can submit evidence to the arbitrator and the appeal. Arbiter of evidence is based on two sides to give rewards and punishments on the trust arbitration. Effectiveness through the implementation of trust and assign tasks denied that an agreement ensures the fairness of assessment. Colored Petri nets are through the analysis tool, and the model is obtained with the activity and industry. Repast simulation tools are using the number of different tasks under the model simulation, and the analysis that is obtained the model has certain safety and efficiency.