Trust bootstrapping model for computer network collaborative defense system

The process of trust bootstrapping was investigated, and the trust type based trust bootstrapping model was proposed in order to solve the problem of trust bootstrapping in computer network collaborative defence (CNCD). First, the division of trust type based on the behavior model of defense Agent was discussed. Then, the relationship of trust utility and defense cost was analyzed according to the game theory. Based on the above analysis,the constraints of executing defense test task were proposed. The trust type of defense Agents was identified by executing defense test tasks. The initial trustworthiness of defense Agents was assigned by two means, including assigning the corresponding values and weighted mean. The simulated experiment results show that, relative to other models, the proposed model has lower failure rate of defense tasks, and better adaptability in the aspect of defense task execution.