@TechReport{WM-CS-2007-11,
	author = {Haodong Wang and Bo Sheng and Chiu C. Tan and Qun Li},
	title = {{WM-ECC: an Elliptic Curve Cryptography Suite on Sensor Motes}},
	institution = {College of William and Mary, Computer Science},
	address = {Williamsburg, VA},
	number = {WM-CS-2007-11},
	year = {2007},
	month = {},
	URL = {}
	}

Abstract 

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 technical report describes the ECC (Elliptic Curve
Cryptography) public-key cryptosystem implementation in the real world
sensor devices. We detail the implementation of 160-bit ECC
cryptosystems over prime field on MICAz, TelosB and Tmote Sky sensor
motes. We evaluate the performance of our implementation by running
digital signature generation and verification. We have achieved the
performance of 0.77s for signature generation and 1.12s for signature
verification on Tmote Sky sensor motes. Comparatively, we show the
performance on MICAz and TelosB motes are 1.35s and 1.45s for
signature generation, 1.96 and 2.25 for signature verification. This
technical report summarize our previous implementation effort.