Info <info@xxxxxxxxxxx> wrote: > I have managed both a small overburn, and any amount of underburn, now I > just keep burning the same image file with different files on it. I have > my doubts about the security of this, as any space that is not rewritten > between burns will have the same data on it, that would certainly tell > someone about the size of the data written, and might provide other > avenues of attack. > > The reason I used ext2 (which I don't think is journalled afaik) was > it's ability to support all the filenames and directory depths that I > might find on the volume I an writing to DVD. As pointed out > compatibility with Windows is out anyway until loop-aes is available > there. Also it can handle symbolic links, I'm not sure that they would > be OK with iso9660. > > BTW, does anyone know of a way of making symbolic links to volumes that > are offline that when you try to open them run some external program to > cause the volume to be mounted? That way I could keep all the > directories of backed up stuff available, with just access to the data > requiring a volume to be mounted. > > Regards, > Paul Hilton So you have experience in building encrypted DVDs? That´s what I am looking for. Ok, ISO9660 will not allow all that ext2/3 does. As I only use the DVDs for backup there is no need for dozens of subdirs. I´d be interested to know how you actually master the images. You don´t use mkisofs, do you? I´m looking for the right way to create ISO9660 images than can be burned on DVD. The question is how much data fits on DVD? 4.0 or 4.4GB? I don´t want the key to be stored with the data on DVD. My testing has shown hang ups on very full directories. Sometimes seeks failed and such. It might be a matter of bad media quality or unsuitable mastering. In brief, I build up directory tree, called mkisofs -r and piped the iso through aespipe. Output can than be burned to DVD with Nero or k3b. Jari uses a 8192 byte section on beginning of CDROM to store the key and some zeroes. I store the key elsewhere. Maybe the missing free space is the cause for the lock ups? I´m interested in concrete examples. Regards, Peter -- 10 GB Mailbox, 100 FreeSMS http://www.gmx.net/de/go/topmail +++ GMX - die erste Adresse für Mail, Message, More +++ - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/
