In order to solve the problem that the roaming authentication protocol of current mobile sensing nodes has some defects in light weight property,switching speed,and security,a roaming authentication protocol based on non linear pair was put forward.Theoretical analysis showed that this protocol not only satisfies the general security requirements,but also the untraceability of current roaming authentication protocol.Computation and comparison showed that the protocol has a lower computation load.Finally,through simulation,the robustness of the protocol under complex network environment was analyzed.The comparison to the roaming authentication protocols of several typical mobile nodes showed that the present protocol processes good robustness under moderate severe conditions.
