Abstract
Industrial Control Systems (ICS) are widely deployed in nation’s critical national infrastructures such as utilities, transport, banking and health-care. Whilst Supervisory Control and Data Acquisition (SCADA) systems are commonly deployed to monitor real-time data and operations taking place in the ICS they are typically not equipped to monitor the functional behaviour of individual components. In this paper (This paper expands on an earlier position paper presented at the International Symposium for Industrial Control System and SCADA Cyber Security Research 2014), we are presenting a runtime-monitoring technology that provides assurances of the functional behaviour of ICS components and demonstrates how this can be used to provide additional protection of the ICS against cyber attacks similar to the well-known Stuxnet attack.
Highlights
Industrial Control Systems (ICS) and their often proprietary technologies are underpinning many systems we have come to rely on in our lives
Historic data is stored on an SD card for backup and offline analysis through a sliding window
This is facilitating forensic analysis after a critical breach an can provide additional information that is not normally reported to or stored by Historian databases, as it directly relates to the action taken by the controller rather than monitoring and archiving sensor data
Summary
Industrial Control Systems (ICS) and their often proprietary technologies are underpinning many systems we have come to rely on in our lives. Systems are responsible for the monitoring and control of a wide range of a nation’s critical infrastructures. Examples of these including electricity, gas supply, logistics services, banks and hospitals. Cyber attacks against these infrastructures can have wide ranging consequences for the nation’s economy, its political stability and the well-being of its people. As technology progressed, mini-computers were used to perform the decision making and control of the systems, though these systems were very centralised, relying on mainframe computers for control and data acquisition functions. The use of general purpose operating systems, and open standards such as LAN protocols has allowed formerly centralised systems to become more distributed, allowing control to be located closer to the field devices [4]
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