|Abstract: ||Described herein are various technologies for providing active mitigation
of cyber-attacks against industrial and other control systems. A
filtering device is connected to a backplane of a control system and
receives communications from various modules of the control system. The
filter device analyzes the received communications and determines whether
they are genuine and permissible communications for the control system.
Validated signals are output to a communications bus of the control
system by the filter device, while impermissible communications are
blocked. The filter device can be interposed between the modules of the
control system and the backplane, or the filter device can be included as
a component of a control system backplane.