passphrases with more than 160 bits of entropy

Travis H. solinym at
Tue Mar 21 15:44:23 EST 2006


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

I was thinking that one could hash the first block, copy the
intermediate state, finalize it, then continue the intermediate result
with the next block, and finalize that.  Is this safe?  Is there a
better alternative?
Security Guru for Hire -><-
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