ICS and supervisory control and data acquisition (SCADA) systems security have been serious concerns for more than a decade, but have come under increased scrutiny following the discovery of the Stuxnet virus in 2010, the DuQu virus in 2011, and the Shamoon virus in 2012. The report states that all of these viruses were found to specifically target industrial control systems.
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The report also includes detailed results and analysis from the second annual RISI Control System Security Benchmark Survey. The survey data provides insight into the current state of control system security, especially when compared with the data regarding actual incidents. For example, RISI data indicates that 33 percent of all ICS security incidents were perpetrated through remote access. This data is supported by 48 percent of survey respondents reporting that remote access to the controls systems is allowed at their facilities.
You may purchase the annual report here.