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<p style="margin-bottom: 0cm; margin-top: 0pt;">Hello,</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><br>
</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;">I have a piece of
sensitive data, which I'd like to keep locked away when I don't use it.
It's reassuring to know, that even if my computer would ever meet a
trojan horse, that data will be off limit, unless I would happen to be
using it in very bad timing.</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><br>
</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;">Having a Fedora 12
(kernel 2.6.32 for now), the immediate solution is to create a large
empty file, mount it as a loop device, and create an encrypted disk on
it. When I don't use the data, I simply close the encryption, and all
is safe and sound.</p>
<p>The only thing that worries me, is that the disk itself is a RAID-5
(three disks) with the whole thing encrypted (that is, the whole of
/dev/md0, which is why I don't have any unencrypted space left) and
then we have LVM over that. So if I pull my stunt, there will be five
layers of munching between real data and what is written on the
hardware disk. Including encrypting twice.</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;">In a theoretical world,
one can stack layers without worrying about anything. In a real world,
there are sometimes bugs, which show up in exotic situations.</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><br>
</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;">I have no problem with
some possible slowdown. I only wonder, if I'm not pushing my luck.</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><br>
</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;">So what do you say?
Would you feel safe to stack one encryption on another? Is it correct
to assume that each layer works independently, and therefore it doesn't
matter how much I stack up?</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><br>
</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;">Thanks in advance,</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"> Eli<br>
</p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><code></code></p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><code></code></p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><code></code></p>
<p style="margin-bottom: 0cm; margin-top: 0pt;"><code></code></p>
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