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Due to the limited ability & energy for the computer, there are obvious weaknesses in sensor network than in traditional network on the aspect of system security. Moreover, the common methods of security can't be implemented on sensor network. The idea of trusted computing can be used for sensor network security. Based on the trusted computer base and trusted chain, we propose a trusted sensor network framework, i.e. use the trusted server as a trusted computing base, modify the TinyPK authentication protocol, realize the extending of trusted chain, and therefore it can reduction of traffic can improve the expansibility and lifetime.

Based the concept of trusted chain introduced by TCG (trusted computing group), integrating the operation system bootstrap process, we propose a scheme for security management in services, which should be implemented in a secure operation environment. That is to say, we should first establish a trusted computing platform through a trusted startup process. Then check the integrity of services before their starting and monitor them when they are running in this secure operation environment. So we can ensure the integrity of services whenever we use them.