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Ever since IIOT, production euqipments are in danger of being shut down due to computer virus. Clients have started to request privacy assurance and add information security to their audits. Information security has become an issue that can seriously affect the overall operation of the company.

Besides malicious computer virus, security problem can also occur during the repair, maintain and install of equipements by suppliers entering the site. The integration of OT、OS、IT leads to quick and easy virus dissemination, and the lack of MIS personnel and the ability to monitor and respond immediately is the reason for the increasingly serious problem of organizational information security.

Therefore the primary focus is to establish a standard operating method for smart manufacturing information security protection. Few ways to prevent and block virus from the factory: Conduct information security control on supplier; Request internal operation under three-layer information security management; and install automatic anti-virus scanning system before entrance to result in "Block from the outside and Control from the inside".