LOCKING a dvd so that it cant be copied

From title everybody what i mean…I do know that it is very difficult to lock a dvd and be sure that nobody can "break"it!! For me it is important that somebody
who doesnt know a lot about dvds , cannot copy my dvd…idont search for something really professional but just for a liiittle security from those who dont know much of cracks and all these illegal things…:wink:

could you let me know of any software that i could find on internet?