International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 28 November 2012

Daniel R. L. Brown
ePrint Report ePrint Report
To have \"full\" entropy has been defined in a draft NIST standard to be to have min-entropy very close, proportionally, to the min-entropy of a uniform distribution. A function is uniform if all its preimages have the same size. This report proves that the output of any uniform compression function can fail to have full entropy, even when the input has full entropy.

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