I want to know this just for fun - I am curious if making a “unique” DVD is possible. Suppose DVD contains material that is playable on a standard set-top box DVD player.
Ok, now say someone rips my DVD content onto another DVD. Someone sends me the ripped DVD, then tells me “this is the original DVD you made”. If I analyze it I can say, almost for sure (I mean, unless they used a $100,000 dvd mastering and printing press to make the dvd, and maybe even then they can’t replicate the DVD exactly even if they’re really careful) that “nope, this is a copy, not the original DVD.”
Ideas on how to do this?
Ways I can think of (in combination)
Each DVD contains differences in actual contents/ material, such as DVD menu background, even the actual content, etc. Some variations in the content may be obvious and some may be subtle
Each DVD contains unique graphics that are laser embedded onto the DVD, possibly containing subtle patterns (Lightscribe or LabelFlash - I think I like the latter better because can be put on bottom too of unused data as well as the top)
The serial numbers and other numbers that physically appear on the DVD are taken note of, and also exactly where they are on the DVD and how they appear (i.e. photographs of finished DVD, including #2)
Additional ideas and questions (not 100% sure about these two below)
Taking note of the full Media Identification Code displayed from program like DvdInfoPro (is it actually unique for every DVD ever made? I think it is, because I checked it and there was actually a variation in 3 of the bytes of the MID when I checked 2 DVD’s I burned that were even from the exact same spindle set I bought, MID was slightly different for those two DVD’s! -is that correct that full MID code is unique for every DVD made from the moment they were pressed in factory (even blank ones)? If yes, then great! Is it easy to create another DVD with the exact same full Media Identification Code as original DVD without access to a special printing press? If answer is “no”, then sweet!)
Creating a few but very particular physical “scratches” on the DVD after it has been finalized (maybe some of them even subtly appear physically on the DVD) that will result in certain artifacts appearing/sounding at places in the actual DVD when it is played e.g. from 00:01:30 to 00:01:34 there is a “scratch” on DVD that makes some particular visual artifacts appear. Ideally it would be very hard (probably impossible) to get the exact same glitches ever again if someone were to copy DVD and try to make the similar “scratches” (and copying files from DVD using burning software shouldn’t work and shouldn’t create the same glitch pattern). Also ideally the scratches are very minimally or not affected by normal wear and tear, such that the video signal glitch stays pretty much the same. Not sure how to do this. A low level software that controls the burning laser manually, and subtly applies a certain amount of “marring” to a specific sector of my choice on a finished DVD? Only issue I can think of even if this were possible, is that an analog hole reproduction could probably reproduce it, but maybe a difference could still be detected in the DVD somehow (i.e. perhaps a low level software reading the relevant sectors would not return exact same bytecode as would on the originally marred sector)
Crazy idea -> Say I use labelflash DiskT@2 for the bottom of DVD. If I take a low level dvd reading software and start reading the entire “invalid data” part (where the DiskT@2 graphic visually appears on the bottom of the DVD) and take note of it, if an attempt was made to copy it onto another DVD, would the bytecodes returned by this be radically different, particularly in the case of an attempt to reproduce the t@2’ed image from the original dvd, on a new DVD?
Any other ideas?