![]() In contrast in the case of dvd's primitive version of multiple playlist obfuscation drm, the garbage playlists were so obvious even by just reading through the "program chains" in the *.ifo files. Tricks like this have been around for decades). (In principle it is also possible to further "obfuscate/encrypt" the java code itself on disc and in memory, until it is de-obfuscated at the moment before execution. Without any obvious hardcoded shortcuts (such as a database), I strongly suspect a semi-successful general algorithm would probably involve "tracing" through the bluray java code underlying the multiple playlists obfuscation. Brute force type approaches of going through every playlist might not be effective anymore. In the scenario of makemkv not doing much of anything to choose "correct" playlists on blurays, it would suggest their programmers might not be too savvy about cracking the extra screenpass drm on bluray. (Some more rambling thoughts on multiple playlists obfuscation drm). Case-by-case hacks are simply not good enough for a general purpose ripping product. Since anydvd/dvdfab/makemkv are selling a one-click solution product, they have to put effort into defeating dvd/bluray drm as a general all-purpose algorithm which is applicable to many dvd/bluray discs. fooling it into eliminating every single possible playlist). But going through less than 99 playlists is viable to do by hand.Ĭurrent multiple playlists obfuscation drm on dvds (mostly Lionsgate), attempts to fool programs like anydvd/dvdfab into either choosing the wrong playlist(s) or choosing nothing (ie. In contrast, going through hundreds or thousands of playlists is simply not viable to do by hand. Back in the dvd era, this multiple playlist obfuscation was easy and fast enough to defeat even by a sheer brute force method of going through every single playlist and seeing which ones looked "sane". With the dvd's severe specs limitations lifted, this multiple playlist obfuscation is viable nowadays on bluray. The way I think about extra basketcase dvd drm nowadays, is how it foreshadows many possible bluray drm schemes which Sony and other drm designers can come up with.įor example, such as the multiple playlists + obfuscation "screenpass" drm on bluray, which had many antecedents back in the late-2000s on dvd. ![]()
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