Re: tlug: enscription thru loop device.

[Kei Furuuchi <kfur@example.com>]

Karl-Max Wagner writes:
 > > I am sorry I don't quite follow.
 > > That is because I made up the word that I actually mean "encrypt".
 > 
 > Well, figured it out finally :-).
 > 
 > > If I wasted your time and Karl-Max', I am really sorry.
 > 
 > Shit happens, as they say. Don't worry....
 > 
 > What I actually don't quite get is why you wanna encrypt the
 > file system on a CD. It may make sense on a HDD because that
 > normally is always in a computer. However, CD's with sensitive
 > data can ( and should be ) locked up. Furthermore, DES is not

For a personal use, I thought the other way arround. It is easy to use 
cdrom than your HDD. No body rather bother to use your HDD by
physically breaking into your computer and retrieving HDD than somehow 
unlocking where cdroms are located. And they are easily missed.

 > terribly secure, to say the least. Better you tar and bzip2 your
 > sensitive stuff and then encrypt the result using PGP. Write the
 > ensuing file to a CD. Then you can wish all those trying to
 > crack that good luck.......They're gonna need exactly that.

For a personal use, it is ease of use. if kernel handles both
encryption and decryption in partition device level, it is transparent
all the way. I don't need extra space where I descrypt and un[gb]zip
and untar. I don't know relationship between encryption and
compression, but where there is redundency I can see pattern of
encryption of both xor and des. So I felt the encryption is weak. I
agree compression is needed before encryption. Again there is kernel
patch that does cdrom compression called iso9660-compress. So I think
there are needs and works already done for the purpose before me. It
is not just standard feature of Linux kernel.
Anyway I could patch loop.c. It is working now.

Regards,
Kei.

 > 
 > ================================================================
 > "It was hell. They knew it.          Karl-Max Wagner
 >   But they called it                 karlmax@example.com
 >     W-I-N-D-O-Z-E"
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Next Nomikai: 20 November, 19:30 Tengu TokyoEkiMae 03-3275-3691
Next Meeting: 12 December, 12:30 Tokyo Station Yaesu central gate
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Sponsor: PHT, makers of TurboLinux http://www.pht.co.jp