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List:       cypherpunks
Subject:    Re: disk encryption modes (Re: RE: Two ideas for random number generation)
From:       Julian Assange <proff () suburbia ! net>
Date:       2002-04-27 1:19:04
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> You could encrypt twice (CBC in each direction or something), but that
> will again slow you down by a factor of 2.

You can't easily get away with storing the IV as multiple parts of the IO
pipe like to see blocks in 2^n form. 

The approach I take in Rubberhose is to calculate the IV from a
very fast checksum routine and salt.

--
 Julian Assange        |If you want to build a ship, don't drum up people
                       |together to collect wood or assign them tasks and
 proff@iq.org          |work, but rather teach them to long for the endless
 proff@gnu.ai.mit.edu  |immensity of the sea. -- Antoine de Saint Exupery

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