• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.632-634
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• 2021

In proportion to the development of the Internet and the increase in users, the rate of cyber-incident using it is increasing. As a countermeasure, there is a network separation method that separates the system accessible to users and the system containing key information from each other. However, in the case of tasks that require the use of the Internet network, it is exposed to cyber attacks, and there are many loopholes in the method of data transmission between networks and the management and operation of the system, resulting in infection of the closed network. In this paper, we aim to enhance the safety of the networking system by investigating the types and cases of infringement accidents in these network separation environments.