TelosB Implementation of Elliptic Curve Cryptography over Primary Field WM-CS Technical Report (WM-CS-2005-12)

Even though symmetric-key scheme, which has been investigated extensively for sensor networks, can fulfill many security requirements, public-key cryptography is more flexible and simple rendering a clean interface for the security component. Against the popular belief that public key scheme is not practical for sensor networks, this paper describes a public-key implementation in a sensor network. We detail the implementation of Elliptic Curve Cryptography (ECC) over primary field, a public-key cryptography scheme, on TelosB, which is the latest research platform in Berkeley Motes family. We evaluate the performance of our implementation and compare with other implementations we have ported to TelosB. We have achieved 3.3 seconds for public key signature and 6.7 seconds for verification in our implementation even though the hardware multiplier is disabled.