International Journal of Signal Processing Systems Vol. 3, No. 1, June 2015 R. C. Choukimath and V. V. Ayyannavar Abstract—Message authentication is one of the most effective ways to thwart unauthorized and corrupted messages from being forwarded in wireless sensor networks (WSNs). For this reason, many message authentication schemes have been developed, based on either symmetric-key cryptosystems or public-key cryptosystems. Most of them, however, have the limitations of high computationa ...