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RE: Crypted CDROMs
Tim, et al.:
Well now, this is quite useful information! I have been looking
for a way to burn encrypted CD-RWs in a "standard" manner (at least for
Linux). I am curious, can I use CD-Roast be used to burn the CD-ROM (I
like its GUI)?
Using cdrecord is fine, but I am just curious if you have tried that?
One thing that has interested me for some time would be the
ability to burn an encrypted disc in such a way that it could be
readable under either Linux or Windows. Of course this (I imagine) would
require firstly a port of loop-aes to Windows (which does not exist),
and then the implementation of a virtual Linux filesystem under Windows.
A friend has been looking into that for a while (porting
loop-aes to windows), but has not had the time to get it started yet.
I am curious, with respect to DVD burners, how do you think this
kind of process (as you describe for making CDs) would translate into
making DVD images? I am not a DVD burning expert at all (I know very
little), but I do have a particular instance where being able to burn
about 3-GB of encrypted data on a DVD would be explicity useful (even if
only able to be read under Linux). I see the DVD burners are down to
$499, but I have not acquired one yet as I am not sure if they decided
on a standard yet, or if they are able to be read (the DVD-Rs/DVD-RWs)
by standard DVD drives.
Very Respectfully,
Stuart Blake Tener, IT3 (E-4), USNR-R, N3GWG
Beverly Hills, California
VTU 1904G (Volunteer Training Unit)
stuart@bh90210.net
west coast: (310)-358-0202 P.O. Box 16043, Beverly Hills, CA 90209-2043
east coast: (215)-338-6005 P.O. Box 45859, Philadelphia, PA 19149-5859
Telecopier: (419)-715-6073 fax to email gateway via www.efax.com (it's
free!)
JOIN THE US NAVY RESERVE, SERVE YOUR COUNTRY, AND BENEFIT FROM IT ALL.
Friday, March 01, 2002 6:54 AM
-----Original Message-----
From: linux-crypto-bounce@nl.linux.org
[mailto:linux-crypto-bounce@nl.linux.org] On Behalf Of Tim Renner
Sent: Thursday, February 28, 2002 4:37 PM
To: Erik Kunze
Cc: linux-crypto@nl.linux.org
Subject: Re: Crypted CDROMs
I don't know if this ever got resolved or not, but I just burnt an
encrypted CD with ext2 format... here's what I did for anyone
interested, step by step...
Oh, I'm using loop-AES 1.5b... I never did get this to work with just
the cryptoapi, but i had an old version... I'm assuming it was because
of the IV mode problem... anyways, here's what I've done...
// Create the original image
dd if=/dev/urandom of=image.img bs=1M count=650
mke2fs -m 0 -b 1024 image.img
mount -o loop image.img temp
<Copy stuff into temp to fill the image>
umount temp
// Encrypt it
// image.img must NOT be mounted at this point>
losetup /dev/loop0 image.img
losetup -e aes256 /dev/loop1 image.img
<enter password>
dd if=/dev/loop0 of=/dev/loop1 bs=1M conv=notrunc
sync
losetup -d /dev/loop0
losetup -d /dev/loop1
<test it, make sure everything mounts and
you used the correct password>
// Burn it
cdrecord -v speed=8 dev=0,0,0 image.img
<cd burns>
// Mount it
losetup -e aes256 /dev/loop0 /dev/cdrom
<enter password>
mount /dev/loop0 /mnt
And that's that ;) Hope it helps ;) Give me feedback on whether that
works for everyone or not... If you want a non-destructive encrypt,
simply create a new file of the same size and mount that on /dev/loop1
when encrypting.
-Tim
Erik Kunze wrote:
>
> * Chris Schadl <cschadl@satan.org.uk> [020221 16:57]:
> > Date: Thu, 21 Feb 2002 09:57:44 -0600
> > From: Chris Schadl <cschadl@satan.org.uk>
> > Subject: Re: Crypted CDROMs
> >
> > # dd if=/dev/urandom of=~/crypto.iso bs=1M count=650
> > # losetup -e aes -k 192 /dev/loop0 ~/crypto.iso
> > # mkisofs -r /stuff/SUPAR-SECRET-STUFF/ >/dev/loop0
> > # losetup -d /dev/loop0
> >
> > Then you should be able to mount the encrypted iso image, or burn it
to a
> > CD-ROM.
>
> That's how I did! Please read my initial posting! Mounting of the
image
> fails. I haven't tried to burn the image and mount the CDROM.
>
> -
> Linux-crypto: cryptography in and on the Linux system
> Archive: http://mail.nl.linux.org/linux-crypto/
-
Linux-crypto: cryptography in and on the Linux system
Archive: http://mail.nl.linux.org/linux-crypto/
-
Linux-crypto: cryptography in and on the Linux system
Archive: http://mail.nl.linux.org/linux-crypto/