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1. A device used to invert the sense of pseudorandomly selected bits of a bit stream to avoid long sequences of bits of the same sense. (188) Note: The same selection pattern must be used on the receive terminal in order to restore the original bit stream. 2. [An] analog or digital source of unpredictable, unbiased, and usually independent bits. Note: Randomizers can be used for several different functions, including key generation or to provide a starting state for a key generator. [NIS]