Noise is injected in order to reduce the signal to noise ratio
and make compromise more difficult. Examples include the creation of
deceptions involving false or misleading information, the induction of
electrical, sonic, and other forms of noise to reduce the usability of
emanations, and the creation of active noise-reducing barriers to eliminate
external noises which might be used to cause speech input devices to take
external commands or inputs.
Complexity: Noise injection is fairly simple to do, but it may be hard to
definitively determine when the noise level is high enough to meet the
threat.
fc@red.a.net