SCADA: A Deeper Look

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)


  • Directly wired
  • Power line carrier
  • Microwave
  • Radio (spread spectrum)
  • Fiber optic

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 security

Cyber methods considered:

  • passwords
  • dial-back verification
  • selective access
  • virus scans
  • encryption and encoding
  • Share this: