In this project, we show our implementation of a privacy-preserving authentication protocol on TelosB platform, and compare the performance with different enhanced features on TelosB. Meanwhile, our experiment shows that it takes a reasonable 3.6 seconds to conduct an authentication process. This result shows us that EC computation is feasible for sensor network security applications. Moreover, this scheme should be applicable on RFID device, since all of the expensive EC computation is conducted on reader, which is much more computationally powerful than regular sensor mote.