http://www.m2review.com/dvd-and-dvd-copy-protection.html – best bet for encryption/DRM
Great. Thanks for the info. I didn’t know this.
To me, the best solution is to use software to misguide any cd copy practice.
You need to encrypt your CD.
If someone really wants to copy your data they will find a way but to deter people use a software like “Cryptainer LE” which is encryption software that’s free.
I want to develop Interactive CD…
Difficult task.
Depending on your application (for the interactivity) you could check the CD serial # and only allow the app to run if the # is XXXXX. I’ve been doing that and it works. Of course one can also modify the serial number of the CD to be the same as the source, but anyway is just a suggestion. Hope it helps
Shoot it or blow it up. 
Now that would be difficult to copy.