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Power control system like SCADA(Supervisory Control And Data Ac quisition) is gathering information using RS232C and low-speed analog communication network. In general, these metho ds are known as secure because of the secure characteristics from the analog based communication network and serial communic ation. In this study, first we build DNP communication environment usi ng commercial power control simulator and find some vulnerabilities by testing from the viewpoint of confidentiality, integrity and availability. Consequently, we see the necessi ty of a valid method for authentication and data encryption when gath ering information, even though that is known as secure so far.Discussion of needs of DNP authentication and data encryption i s started about several years ago, but there is still nowhere applied that on real environment because the current methods ca n not fully meet the security requirements of the real environment. This paper suggests a solution to the vulnerabilit ies, and propose some considerations for enhancing power contro l system's security level by applying DNP authentication and data encryption.Keywords: DNP vulnerability, Power Control System, SCADA (2013 6 13), (1: 2013 9 2, 2: 2013 11 5), (2013 12 2)†, creative@kpx.or.kr‡, cenda@korea.ac.kr (Corresponding author)

A study on vulnerabilities of serial based DNP in power control fields