Study of Initiative Security Mechanism for Migrating Instance in Migrating Workflow System

In migrating workflow system, the migrating instance which behavior is similar to mobile agent is dispatched to execute task on the workplace, so the migrating instance faces the same security problem as the mobile agent. However, most of the present protecting mobile agent security methods are in passive ways. In this paper, we propose a model with the danger detection algorithm to protect migrating instance from attacks initiatively based on the security proxy agent. While the migrating instance is executing on a workplace, it creates and dispatches a security proxy agent to the next workplace in order to evaluate if the next workplace is safe or not, and the migrating instance could evade the unsafe zone with the help of the evaluation result. We also give an example to demonstrate that our method provides a practical solution.