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Introduction
What is SCADA?
Many industrial measurement, monitoring and control systems use SCADA, especially electricity and natural gas utilities, water and sewerage utilities, railroads, communications and other critical infrastructure sectors. It enables remote monitoring and control of a variety of industrial devices as diverse as water and gas pumps, track switches and traffic signals.
SCADA Security
The majority of SCADA systems have useful lifetimes ranging from 15 to 30 years. In most instances the underlying protocols were designed without modern security requirements in mind. The rapid advance of technology and the changing business environment is driving change in SCADA network architecture, introducing new vulnerabilities to legacy systems. The current push towards greater efficiency, consolidated production platforms and larger companies with smaller staffing levels is leading to changes in SCADA systems which are raising many questions about security. In summary, these involve:
- an increasing reliance on public telecommunications networks to link previously separate SCADA systems;
- increasing use of published open standards and protocols, in particular Internet technologies; and
- the interconnection of SCADA systems to other business networks to enhance the amount, detail and timeliness of information available to management.
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