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Introduction
Where does the threat come from?
Electronic attacks on SCADA systems could come from a number of different sources. Following are some examples of threat sources, however, these have not been ranked in any order:
- insider attack from employees or ex-employees who are disgruntled or for any other reason are a possible security threat;
- organised crime may be driven by financial incentive to penetrate SCADA systems;
- genuine mistakes made as a result of lack of training, carelessness or an oversight;
- terrorists who may be seeking to add electronic attack to their existing capabilities;
- generic Internet threats such as worms, trojans and viruses that infect systems on the Internet can also affect SCADA systems when they use the same software and protocols. This may not be the result of a deliberate attack, SCADA systems may be infected merely because they can be.
- recreational hackers, crackers and virus writers motivated primarily by the challenge and a fascination with technology;
- script kiddies who are primarily untrained and yet have hostile or thrill-seeking intentions towards almost anything connected to the Internet;
- activists conducting publicity-seeking attacks; and
- corporate attackers that spy on competitors to gain a competitive advantage.
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