ATTACK DETECTION METHOD FOR SMART GRID SYSTEM USING HOMOMORPHIC ENCRYPTION AND SMART GRID SYSTEM

摘要

A method for identifying an attack node in a smart grid system comprises the steps of: allowing a data collection node, which is a root node, to receive a final measurement value and a final integrity check value of the entire trees transmitted by affiliated nodes, using a homomorphic encryption scheme; allowing the data collection node to examine whether the received final measurement value includes abnormal data based on the final integrity check value; and when the received final measurement value includes abnormal data, repeating the process of dividing the affiliated nodes into two trees until only a node which has transmitted the abnormal data is left, and selecting a tree from which the abnormal data is generated, based on a final measurement value and a final integrity check value of the divided trees.