Password security - Another idea

[Piet van Oostrum]

In article <10629 at rpp386.Dallas.TX.US>, jfh at rpp386 (The Beach Bum) writes:
`
`No - you are still only storing 56 bits of password data.  What you
`are doing is providing a multi-way encryption algorithm, you are not
`expanding the key space.
`
`Since there are only 2^56 possible outputs, and 2^132 inputs, some of
`them must map onto other encrypted passwords - a multi-way encryption.
`
You are right, only it is 2^64 (the key for DES is 56 bits, but the output
is 64 bits), so this still gives an 8 bit improvement, making it 128 times
as hard.
-- 
Piet van Oostrum, Dept of Computer Science, University of Utrecht
Padualaan 14, P.O. Box 80.089, 3508 TB Utrecht, The Netherlands
Telephone: +31-30-531806        UUCP: ...!mcvax!hp4nl!ruuinf!piet