OSEC

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Re: CBC and LRW?

From: Curt Sampson (cjscynic.net)
Date: Tue Jul 25 2006 - 21:22:49 CDT


On Tue, 25 Jul 2006, Jan Danielsson wrote:

> As far as I can tell, NetBSD's cgd only uses cbc. Should it support LRW?
>
> I don't actually understand what CBC vs LRW that means, though. But
> I'm going to assume that the TrueCrypt people do.

The main difference appears to be better deniability: someone who can
convince you to store a specially crafted file on your encrypted disk
can then, given just the encrypted disk, prove that the file is stored
there.

And yes, cgd should be supporting this, though I wouldn't say it's
critically urgent. Still, getting it in sooner rather than later, (and
getting it ported back into a 3.x release) would be a good thing in that
it would help cgd maintain its reputation as one of the very best disk
encryption systems out there.

cjs
--
Curt Sampson <cjscynic.net> +81 90 7737 2974
   The power of accurate observation is commonly called cynicism
   by those who have not got it. --George Bernard Shaw