This paper presents the concept of integrated knowledge-based and simulationbased supervisory control for process facilities. Linked to a common SCADA system, such knowledge-based decision procedure, which includes process simulation, assists the operator and facility engineer in operating the facility. The functional chain, which begins with operator knowledge acquisition and moves to knowledg...

SCADA traffic between the Human Machine Interface (HMI) and the Programmable Logic Controller (PLC) is known to be highly periodic. However, it is sometimes multiplexed, due to asynchronous scheduling. Modeling the network traffic patterns of multiplexed SCADA streams using Deterministic Finite Automata (DFA) for anomaly detection typically produces a very large DFA, and a high false-alarm rate...

Supervisory Control and Data Acquisition (SCADA) system employ a wide range of computer and communication technologies. Advances in the technologies have helped in improving the effectiveness of SCADA. One such recent technological development is Internet and the World Wide Web. The operational and commercial needs of the power industry require information systems to not only perform traditiona...

Industrial Control Systems (ICS) and SCADA (Supervisory Control and Data Acquisition) systems are typically used in industries such as electricity generation and supply, gas supply, logistics, manufacturing and hospitals and are considered critical national infrastructure. The evolution of these systems from isolated environments into internet connected ones, in combination with their long serv...

As Supervisory Control and Data Acquisition (SCADA) systems control several critical infrastructures, they have connected to the internet. Consequently, SCADA systems face different sophisticated types of cyber adversaries. This paper suggests a Probability Risk Identification based Intrusion Detection System (PRI-IDS) technique based on analysing network traffic of Modbus TCP/IP for identifyin...

This paper proposes a testbed for validating how our process-aware monitoring approach is able to increase the security of decentralized SCADA networks in power grids. The testbed builds on the simulation framework Mosaik, and cosimulates in an integrated way, the power distribution network itself, and the control network (Modbus/TCP). By extending the existing Mosaik framework with with a SCAD...

This paper proposes a functionally distributed computer system for an EMS and a large-scale SCADA system that features parallel processing and independence of subsystems in order to overcome the limitations of overly large and complex systems. Such a system would increase performance, flexibility of expansion, improve reliability and reduce costs. The feasibility of such a system was investigat...

In this paper we present an intrusion detection module capable of detecting malicious network traffic in a SCADA (Supervisory Control and Data Acquisition) system, based on the combination of One-Class Support Vector Machine (OCSVM) with RBF kernel and recursive k-means clustering. Important parameters of OCSVM, such as Gaussian width σ and parameter ν affect the performance of the classifier. ...

This paper presents the development of Smart Grid testbed using SCADA software and Xbee wireless communication. The proposed testbed combines both the software simulation and the hardware simulation. The Winlog SCADA software is employed to implement the algorithm in the Smart Grid system. To communicate between nodes and the Smart Grid Center, the Xbee wireless communication is employed. The t...

Supervisory Control and Data Acquisition (SCADA) systems are vital components of most nation’s critical infrastructures. SCADA systems are primarily control systems. They control pipelines, water and transportation systems, utilities, refineries, chemical plants, and a wide variety of manufacturing operations. Sensor networks are becoming increasingly important in various applications such as m...