Sensor networks for various event detection applications cannot function\r\neffectively if they are vulnerable to attacks. Malicious nodes can generate incorrect readings\r\nand misleading reports in such a way that event detection accuracy and false alarm rates are\r\nunacceptably low and high, respectively. In this paper, we present a malicious node detection\r\nscheme for wireless sensor networks. Unlike others using a single threshold, the proposed\r\nscheme employs two thresholds to cope with the strong trade-off between event detection\r\naccuracy and false alarm rate, resulting in improved malicious node detection performance.\r\nIn addition, each sensor node maintains the trust values of its neighboring nodes to reflect\r\ntheir behavior in decision-making. Computer simulation shows that the proposed scheme\r\nachieves high malicious node detection accuracy without sacrificing normal sensor nodes\r\nand outperforms the scheme using a single threshold
Loading....