• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.992-995
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• 1996

The major roles of Power SCADA System are continuous monitoring of electrical equipments state, real-time data processing and dispatching. Especially, SCADA system demands fast response time in heavy load condition, high reliability, fault tolerance, expansion capacity for the future. According to developing computer system technology, SCADA system is changing system configuration from centralized processing system to distributed processing system. This paper describes operational benefits, problems and improvement (which is studying in theory) in the application of Open System Architecture SCADA which has been installed since 1994, Seoul regional control center in KEPCO.

• Convergence Security Journal
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• v.19 no.5
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• pp.55-61
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• 2019

This paper studied security measures to protect the SCADA network from the increasingly sophisticated threats. Currently, SCADA system security uses methods that are almost like regular IT security systems. While there may be some common security techniques, security techniques are needed only for SCADA systems that are different from typical IT systems. Therefore, this paper will explore the security techniques currently used in SCADA systems, and the problems that arise when the current security techniques are used will be identified through the damage cases resulting from attacks in SCADA systems. Finally, as a new solution to ensure the availability and integrity required for current SCADA systems, we proposed linking Blockchain and SCADA systems.

• The KIPS Transactions:PartC
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• v.16C no.1
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• pp.37-50
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• 2009

The SCADA(Supervisory Control And Data Acquisition) system is a control system for infrastructure of nation. In the past, the SCADA system was designed without security function because of its closed operating environment. However, the security of the SCADA system has become an issue with connection to the open network caused by improved technology. In this paper we review the constraints and security requirements for SCADA system and propose advanced key management architecture for secure SCADA communications. The contributions of the present work are that our scheme support both message broadcasting and secure communications, while the existing key management schemes for SCADA system don't support message broadcasting. Moreover, by evenly spreading much of the total amount of computation across high power nodes (MTU or SUB-MTU), our protocol avoids any potential performance bottleneck of the system while keeping the burden on low power (RTU) nodes at minimal.

• Proceedings of the KIEE Conference
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• 2007.11b
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• pp.291-293
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• 2007

SCADA (Supervisory Control and Data Acquisition) SCADA refers to the combination of telemetry and data acquisition [1]. SCADA system has been used for remote measurement and control on the critical infrastructures as well as modem industrial facilities. Electric Power system is a representative system using SCADA network for its communication. Integration between many networks and increasing threatens of terrorism have made the potential risk by cyber attacks real and bigger in power system. Recently, many researching efforts have been made on SCADA network for improving its security. In general aspect, there are already several ways to secure the system like encryption, firewall, authentication, etc. In this paper, we focus on symmetric encryption method and propose the proper key distribution method to reflect the unique characteristics of SCADA network communication.

• Convergence Security Journal
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• v.6 no.4
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• pp.153-160
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• 2006

The control system is accomplishing very important role in our life currently as the national critical Infrastructure and large scale industry plant. We manage SCADA system to manage generally the control system interconnected with the information system. The operating system of SCADA is changing also to the well-known OS like Windows or UNIX for offer various convenience and facility to the user. We offered the reason why such change of the system makes so that it is exposed to cyber terror. In the traditional SCADA system is managed safely by an isolated network system physically. It is the trend to increase gradually though a cyber terror possibility is thinner on a control system than a information system but the cyber terror gives a nation or community wide damage influence of large scale if it happens. Therefore this paper presents a security safeguard plan about SCADA system and helps prepare systematic security strategy and enhance the security level implement.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.2
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• pp.267-281
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• 2012

SCADA system is a computer system that monitors and controls the national infrastructure or industrial process including transportation facilities, water treatment and distribution, electrical power transmission and distribution, and gas pipelines. The SCADA system has been operated in a closed network, but it changes to open network as information and communication technology is developed rapidly. As the way of connecting with outside user extends, the possibility of exploitation of vulnerability of SCADA system gets high. The methodology to protect the possible huge damage caused by malicious user should be developed. In this paper, we proposed anomaly detection based intrusion detection methodology by estimating self-similarity of SCADA system.

• Journal of the Korean Solar Energy Society
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• v.33 no.6
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• pp.70-76
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• 2013

Recently industrial control systems have been required to ensure intelligent, high tech automation, interconnection and interoperability demands. Therefore, there is a need to redefine the structure concepts of SCADA system for wind power. Also, at this time, the integrated management system is required for the distributed development of wind farms where are needed often interoperability features and exchange information between different wind farms, wind turbines or SCADA systems. In this paper, an integrated structural concepts for SCADA system are defined. Based on this definition of an integrated SCADA system, the basic designs are analyzed on physical layer, system layer and application layer which are corresponded to wind turbine controller, the SCADA server and the SCADA client, and implement HMI. Between the implementation SCADA server and the client, their normal functions were verified at the small scale wind energy test facilities.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.11
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• pp.34-43
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• 2009

SCADA (Supervisory Control and Data Acquisition) system has been used for remote measurement and control on the critical infrastructures as well as modem industrial facilities. As cyber attacks increase on communication networks, SCADA network has been also exposed to cyber security problems. Especially, SCADA systems of energy industry such as electric power, gas and oil are vulnerable to targeted cyber attack and terrorism Recently, many research efforts to solve the problems have made progress on SCADA network security. In this paper, flexible key distribution concept is proposed for improving the security of SCADA network using Multiagent System (MAS).

• KIPS Transactions on Computer and Communication Systems
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• v.1 no.3
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• pp.161-170
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• 2012

In recent years, many researchers and developers have been interested in renewable energy all over the world. Particularly, the development of wind power is being processed actively due to its high economic efficiency. A few years ago, Korean government has started the research for building a large-scale offshore wind farm in domestic west-southern area. Current domestic SCADA technology level for operating wind farm is very low compared with foreign SCADA technology level. In this paper, we found IT issues and solutions for developing SCADA system. Based on these solutions, we designed SCADA system for a large-scale offshore wind farm.

• Journal of Institute of Control, Robotics and Systems
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• v.5 no.6
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• pp.753-763
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• 1999

The existing SCADA(Supervisory Control and Data Acquisition) system software is usually developed to suitable for the specific hardware platforms. However, as per rapid improvement of computer performance and development of network technology, it is required to support scalability and inter-operability in existing different SCADA systems. In order to meet such requirements, in this paper, we propose a new type of SCADA testbed using Java for electric distribution applications. The system consists of three modules; development support tools, client and server modules. The basic architecture of the proposed SCADA system is similar to existing one, however, we improve the function of MTU and MMI interface to facilitate LAN and WAN environment. Also, the proposed system can deals with alarm and history data by using heterogeneous DBMS. Since the system is built in Java environment, the development cost is cheap and it can support sacalability and portability. Our experience can be utilized to develop next generation of small and medium size of SCADA system.