Optimization of Bridge Trust Model in PKI

In PKI technique,by making use of CA certification can availably avoid active attack.In each CA certification area can build hierarchical models or network models,then by traditional bridge trust model can also reach intercommunication among different areas,so that CA and entities can trust each other.But in PKI,perhaps exist more than one trusted dits or an endless circle,thus discovery an certification's path is becoming very complex and time-consuming,so the task that build the path will be an overwork.In the paper by using a path agent server in path agent bridge trust model,by adopting spanning tree algorithm built and store the path ahead of schedule,thus the complex task that build the path is converted into a task that search paths,therefore realize the optimization of the bridge trust model in PKI.