Pacific Northwest National Laboratory
- 24 pages
- July 7, 2008
SCADA Principles of Operation
Interface with Physical Devices
- Remote terminal unit (RTU)
- Intelligent electronic device (IED)
- Programmable logic controller (PLC)
Communications
- Directly wired
- Power line carrier
- Microwave
- Radio (spread spectrum)
- Fiber optic
…
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IEEE Standard 1402-2000
IEEE Guide for Electric Power Substation
Physical and Electronic Security
Provides definitions, parameters that influence
threat of intrusions, and gives a criteria for
substation securityCyber methods considered:
- passwords
- dial-back verification
- selective access
- virus scans
encryption and encoding
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