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In view of the increasingly important position of information security in the development of smart grids, this paper studies the threats and defense strategies of smart grids to information security, and provides guidance for how to solve the information security problems of smart grids. At the same time, the concept and threat of smart grid are described. On this basis, several defense strategies are proposed, including encryption, digital signature recognition, firewall, antivirus, intrusion detection, physical isolation and in- depth defense of information security. The analysis shows that the threat faced by human beings is information security. Information security should focus on the development and construction of smart grids. Several defense strategies are feasible and can provide effective support for the safe and stable operation of smart grids.

Research on Information Security Threats and Defense Strategies of Smart Grid