Travis H. wrote:
Hi,
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
involved.
More than 160 bits is a wide-ranging requirement.
Entropy is a highly discussed unit of measure.
Anyway, keep it simple, use a larger hash: SHA-256, SHA-512, or for hash
with user-selectable size, MASH:
International standard document ISO/IEC 10118-4:1998, Information
technology - Security techniques - Hash-functions - Part 4:
Hash-functions using modular arithmetic
Regards,
--
- Thierry Moreau
CONNOTECH Experts-conseils inc.
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Montreal, Qc
Canada H2M 2A1
Tel.: (514)385-5691
Fax: (514)385-5900
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