Share your knowledge at the LQ Wiki.
Go Back > Forums > Linux Forums > Linux - Security
User Name
Linux - Security This forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.


  Search this Thread
Old 09-13-2004, 08:56 AM   #1
LQ Guru
Registered: Apr 2003
Location: nottingham england
Distribution: Gentoo
Posts: 2,672

Rep: Reputation: 47
idea to hide encrypted file system on audio cd ?

Hey guys...

i have an idea for hiding an encrypted filesystem on a normal audio cd...
can anyone see any problems or drawbacks ?

this is my idea...
create a small audio cd... approxamatly 100 megabytes.
then take the audio cd image, and add 550 megabytes of junk from /dev/urandom to the end.

then use dm-crypt (kernel level device encryption) to encrypt the 650mb image, and pass an offset varable of 100 megabyes, to start the file system AFTER the audiocd part.

im no expert on audio cd file systems... but what im hopng will happen, is when this cd is inserte into a computer or normal audio cd-player, the machine think its a normal audiocd... and plays the music...

but when i run the script to mount the cd as an encypted filesystem with an offset of 100megs, it will act an an encrypted data cd...

am i correct in my assumptions ?
Old 09-13-2004, 04:55 PM   #2
Registered: Feb 2002
Location: Grenoble
Distribution: Debian
Posts: 9,571

Rep: Reputation: 180Reputation: 180
I think it will work. Mounting with offset is rather low-level, so it should be mounted. What I think may be a problem is to properly close the audio cd (not to get noise at the end), but I think it's doable.
Old 09-13-2004, 08:53 PM   #3
LQ Guru
Registered: Apr 2003
Location: nottingham england
Distribution: Gentoo
Posts: 2,672

Original Poster
Rep: Reputation: 47
hmm. but audio CD's have some kind of file sytem that gies the deevice a number of tracks... if the audio cd ISO image has 6 tracks, surely the player will stop playing after track 6 and ignore the garbage ?

anyways.. ill burn a test cd and report back how it went... thanX


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
encrypted file system 212121 Linux - Newbie 4 08-27-2005 05:18 PM
encrypted file system black_man Linux - Software 7 02-23-2004 05:24 PM
encrypted file system deNiro Slackware 2 11-30-2003 12:39 PM
Encrypted File System for 9.2? scottdwright Mandriva 3 11-24-2003 03:53 AM
Encrypted File System? scottdwright Linux - Newbie 2 11-22-2003 04:24 PM > Forums > Linux Forums > Linux - Security

All times are GMT -5. The time now is 06:58 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration