Date: Wed, 2 Mar 2005 18:17:10 -0800 (PST) From: "ALeine" <aleine@austrosearch.net> To: briggs@netbsd.org Cc: ticso@cicely.de Subject: Re: FUD about CGD and GBDE Message-ID: <200503030217.j232HAGG088987@marlena.vvi.at>
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briggs@netbsd.org wrote:
> On Wed, Mar 02, 2005 at 04:33:16PM -0800, ALeine wrote:
> > elric@imrryr.org wrote:
> > > It is _plainly_obvious_ that if you encrypt 2^30 sectors each
> > > with a different 128 bit key then there are at most 2^158
> > > different
> > > ways to decrypt the entire disk. Period.
> >
> > out which of the 2^128^(2^30) sector variations is the right
> one?
>
> Which, I think, is 2^(128 + 30) == 2^158, which is what Roland
> said.
No, you are wrong.
2^128*2^30 = 2^158
We are actually dealing with:
(2^128)^(2^30) = 2^(128*2^30) = 2^(2^37) = 2^137438953472
^--- notice the minor difference
ALeine
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