On Mar 22, 2006, at 4:28 AM, Thierry Moreau wrote:

Travis H. wrote:
Does anyone have a good idea on how to OWF passphrases without
reducing them to lower entropy counts?  That is, I've seen systems
which hash the passphrase then use a PRF to expand the result --- I
don't want to do that.  I want to have more than 160 bits of entropy

More than 160 bits is a wide-ranging requirement.

Entropy is a highly discussed unit of measure.

And very often confused. While you do want maximum entropy, maximum entropy is not sufficient. The sequence of the consecutive numbers 0 - 255 have maximum entropy but have no randomness (although there is finite probability that a RNG will produce the sequence).

Aram Perez

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