Re: [Bug-xorriso] driver and disc ID acquiring, hidden track

[Thomas Schmitt]

Hi,

YU Ri-Ping wrote to me in private:
> I'm sorry for my disturbing because I havn't been admitted into your
> mailing-list "https://lists.gnu.org/mailman/listinfo/bug-xorriso

Did you try to subscribe and were rejected ?
If so, then please tell me the exact procedure you tried.

I found your original mail pending in the spam filter which
lets me (and GNU personel) first check mails from non-subscribers
before they get to the list.


and also in public:
> Now, we want to develop anti-copying and tampering proof function.

This might bring me into loyalty conflicts among my users. :)
If i could tell you how to protect, what to say the next user
who asks about circumventing such protection ?
So i will not directly support protection or cracking of
protection.


> I know there is a unique ID on driver and disc respectively,

The drive might support the Drive Serial Number feature (108h)
which tells the serial number, and the Media Serial Number
feature (109h) which indicates that SCSI command ABh READ MEDIA
SERIAL NUMBER is available.

Currently libburn does not retrieve these informations.
But there is already test code for Drive Serial Number in
libburn/mmc which will get enabled by macro
Libburn_print_feature_descriptorS.
(This is only for development. No API functions exist yet
 to forward this to the application.)


> how to write data into hidden track.

There are no hidden tracks possible with DVD and BD media,
at least not with consumer drives.

I would propose to do some cryptography in normally visible
data.


So you probably need a new plan for the hiding or encryption.

Further you would need one or two new libburn API calls
for drive and media serial number.
If you want i can begin to implement them.


Have a nice day :)

Thomas