Cyber attacks, malware-based, that hit two Power Plants using USB drivers as method of infection. The main problem is that majority of control systems are privately owned, and leak of investment in security advantages the work of hackers. The threats may vary from information theft to a terrorist attack, but the economic impact and financial damage in case of an attack will be much more significant, says Frost & Sullivan Aerospace, Defence & Security analyst Anshul Sharma. The market earned revenues of $18.31 billion in 2011 and estimates this to reach $31.27 billion in 2021.”]