At another utility, in an undisclosed city, Slammer downed the computer network controlling vital equipment.

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To emulate this kind of behaviour - albeit in a more simplistic fashion - Dr Rao and his team are developing a hierarchical brain-computer interface for controlling the robot.

BBC: The robot that reads your mind to train itself

Anyone controlling your PC with administrator access can turn on a microphone or camera to convert a computer into a convenient bug.

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