By William Shaw
SCADA expertise quietly operates within the history of serious software and business amenities national. this crucial device successfully manages application resources, refineries and different severe commercial segments, yet retaining SCADA networks from cyber assaults, hackers or even actual attack is changing into a attempt of will, cleverness and resolution. appropriate for non-technical administration and IT body of workers, this publication offers a high-level assessment of SCADA know-how, with a proof of every marketplace phase. Readers will comprehend the very important matters, and research ideas for reducing or casting off approach vulnerabilities.
advent - commercial Automation within the Aftermath of Sep 11
desk of Contents
Section 1. advent to SCADA structures 1. The Technological Evolution of SCADA platforms
2. distant Terminal devices
three. Telecommunications applied sciences
four. Supervisory keep an eye on functions
five. Operator Interface
6. traditional info expertise protection
Section 2. Cybersecurity ideas, approaches, and applied sciences 7. picking Cybersecurity Vulnerabilities
eight. Classifying Cyber assaults and Cyber Threats
nine. actual safeguard
10. Operational safeguard
eleven. Electronic/Systems protection
12. electrical software Industry-Specific Cybersecurity matters
Section three. commercial Sectors thirteen. Water/Wastewater Industry-Specific Cybersecurity concerns
14. Pipeline Industry-Specific Cybersecurity matters
15. The rising Cyber danger to SCADA platforms
Section four. SCADA safety Architectures sixteen. advertisement and software program Vulnerabilities
17. conventional security measures of SCADA structures
18. taking away the Vulnerabilities of SCADA structures
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Extra info for Cybersecurity for SCADA Systems
This worked well enough for inputs, but if both organizations needed to control the same field equipment, double wiring presented a problem. The solution eventually developed was to use multi-ported RTUs. Additional serial ports were added to RTUs, and separate protocol drivers were assigned to each port. Each SCADA system could interrogate the RTU (possibly using different protocols) on their port, and either could issue control commands to the RTU. A mechanism for coordination of who was or was not to issue controls was needed, and most systems with multiple ports had a scheme in which a parameter or flag in the RTU was used to identify the SCADA system that currently had control rights.
The process industries make extensive use of latched outputs (and some momentary ones), whereas the electric utility industry uses momentary outputs almost exclusively. Since contact outputs are often used to operate equipment that also has a local manual control panel, it is not uncommon (particularly in the electric utility market) to see pairs of outputs assigned to control a given device. For local manual control, many types of industrial and electrical equipment have one button for “on” (or “start”) and a separate button for “off” (or “stop”).
The purpose of such a message is to get all RTUs to take snapshots of their accumulators, at the same instance in time, and hold them for collection by the host computer. This becomes more complicated when there are multiple polling channels, as a mechanism is needed to stop all polling and then, once all polling channels 49 CYBERSECURITY FOR SCADA SYSTEMS are idle, to send out this freeze message on all of them at the same time. This is how it was accomplished with dumb RTUs (as well as on the first smart RTUs).