00897nas a2200169   4500000000100000008004100001260001200042100001300054700001500067700001300082700001900095700001800114245007400132856005800206520044900264022001400713       2007                            d  c2007-071 aSu Sheng1 aW. L. Chan1 aK. K. Li1 aDuan Xianzhong1 aZeng Xiangjun00aContext Information-Based Cyber Security Defense of Protection System  uhttps://ieeexplore.ieee.org/abstract/document/42657243 aThis paper proposes identifying a vicious fault by using context information, such as voltage and current, of the same substation. When the protection system detects a fault based on measurements transmitted through a network, it collects all measurements of the substation and feeds these data to a probabilistic neural network. Thereafter, the fault caused by fake data that differs from the known fault pattern can be identified and blocked.  a0885-8977