Sorry for jumping in at the last minute, but to encrypt something in RAM,
wouldn't you need an external hardware-based encryption algorithm to run the
data through when inputting/outputting? Otherwise, when a program loads data
from the RAM and it gets decrypted, it would show up in the RAM that
decrypts it, right?
Skyler
On Wed, Feb 4, 2009 at 12:01 PM, Michael Reichenbach <
michael_reichenb...@freenet.de> wrote:
> Eric Auer schrieb:
> > Hi!
> >
> >>> If I wanted to protect my mona lisa, I would
> >>> encrypt it and put the key in the first 640k
> >>> where I can be sure the BIOS wipes them :-p
> >> You can only encrypt the harddisk, not the RAM.
> >
> > Yes you can encrypt and/or compress RAM, but of
> > course you get lower performance. Extreme case
> > would be encrypting all pages apart from the one
> > you are using, automatically, hand having a task
> > which re-encrypts all pages as soon as you no
> > longer touch them for a short time. For important
> > data such as keyrings, it is certainly worth the
> > effort to encrypt it in RAM and only decrypt it at
> > the moment when you actually have to work with the
> > real data...
>
> Possible but it would be a real waste of performance and you can be
> still not sure no one steals the masterkey.
>
> >
> >> When using FDE the RAM
> >> is always unencrypted by design, no way.
> >
> > What is FDE?
>
> Full Disk Encryption.
>
> >
> >> If you encrypt something in RAM you can not see it. :)
> >
> > If things were like that, you could not encrypt disk, either.
>
> The moment you see them it must be unencrypted in RAM only, not on hd.
>
> >
> >> Usually you have to hide more then just 1 MB.
> >
> > Not if you use encryption, then you only have to hide keys.
>
> Yes.
>
> And we leaving the original topic that a ram dumper has still point and
> BIOS does not remove much. Oh no, the original topic was dd and how to
> read the memory.
>
> >
> > Eric
> >
> >
> >
> >
> >
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