Fig. 2: Procedure of randomness extraction.
From: Secure random number generation from parity symmetric radiations
The purpose of randomness extraction is to extract from a measurement result i, which may be partially known to Eve, random bits r completely unknown to Eve. In the above picture, i being partially known to Eve is expressed by its being a mixture of black (unknown) and white (known) elements. The number of unknown bits equals the smooth conditional min-entropy \({H}_{\min }^{\delta }({{{{{{{\bf{I}}}}}}}}| E)\), a function of ρIE.
