From http://en.wikipedia.org/wiki/Randomness_extractor http://en.wikipedia.org/wiki/Randomness_extractor: Randomness extractors are used widely in cryptographi

From http://en.wikipedia.org/wiki/Randomness_extractor http://en.wikipedia.org/wiki/Randomness_extractor: Randomness extractors are used widely in cryptographic applications, whereby a cryptographic hash function is applied to a high-entropy, but non-uniform source, such as disk drive timing information or keyboard delays, to yield a uniformly random result. Is that what he is talking about?