By William Shaw
SCADA expertise quietly operates within the historical past of severe software and business amenities national. this crucial software successfully manages software resources, refineries and different severe business segments, yet conserving SCADA networks from cyber assaults, hackers or even actual attack is turning into a attempt of will, cleverness and backbone. compatible for non-technical administration and IT group of workers, this e-book presents a high-level review of SCADA expertise, with an evidence of every industry phase. Readers will comprehend the very important matters, and examine ideas for lowering or doing away with process vulnerabilities.
creation - commercial Automation within the Aftermath of 11th of September
desk of Contents
Section 1. creation to SCADA platforms 1. The Technological Evolution of SCADA structures
2. distant Terminal devices
three. Telecommunications applied sciences
four. Supervisory keep an eye on purposes
five. Operator Interface
6. traditional details know-how safeguard
Section 2. Cybersecurity rules, strategies, and applied sciences 7. picking out Cybersecurity Vulnerabilities
eight. Classifying Cyber assaults and Cyber Threats
nine. actual safety
10. Operational protection
eleven. Electronic/Systems safeguard
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 possibility to SCADA platforms
Section four. SCADA defense Architectures sixteen. advertisement and software program Vulnerabilities
17. conventional security measures of SCADA platforms
18. disposing of the Vulnerabilities of SCADA platforms
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Additional info for Cybersecurity for SCADA Systems
Basic SCADA systems are supervisory control systems, meaning that the decisions to take a control action are made at the host level and then dispatched to the RTU to execute. This is fine as long as the communications bandwidth is sufficient and reliable. If gas pressure needs to be controlled at a delivery point and the target pressure needs to be adjustable based on conditions, then control adjustments to the pressureregulating valve may need to be made every second or faster. With the 44 2 REMOTE TERMINAL UNITS low-baud-rate serial communication schemes used by most SCADA systems (not to mention channel sharing across multiple RTUs), it is typically not possible to read the gas pressure, send it to the host, make a control adjustment calculation in the host, and send a control output command to the RTU all within a second.
All industrial segments make extensive use of status inputs. In many RTUs (and in all of the dumb ones), status inputs are scanned whenever their current values are requested by the host computer. In some instances, status inputs are used to time-stamp critical events or to differentiate the timing between events. In those cases, it may be necessary for the RTU to continuously scan all of the status inputs, looking for changes. This capability was not possible before the development of microprocessor-based RTUs.
Although there have been successful cases of multiple RTU serial protocols 34 2 REMOTE TERMINAL UNITS coexisting on the same communication channel, this is not recommended. It is all too possible for messages and data sent using one protocol to be accidentally interpreted as a valid message by the other protocol. Serial ports RTUs normally come with at least one serial port, through which the SCADA host communicates with the RTU. This serial port is typically dedicated to supporting the protocol messages, either by hardwired logic or program logic.
Cybersecurity for SCADA Systems by William Shaw