emulate a DVD drive including CSS?

[Doom9]

I've been asked that.. is it possible to take a DVD 1:1 without removing CSS encryption, and mount it as a virtual drive and somehow get it to play? Basically all the components are there (reading the DVD, DVD drive emulations, and players that do the decryption on the fly) but I'm wondering if it can somehow be put together to make a working system.

[rasta21]

...isn`t it possible to copy the dvd files via windows explorer...create an image with imagetool classic and mount this image via daemon tools ?

...sounds possible :)

[LIGHTNING UK!]

You cant read the area off the disc where the keys and stuff are.

So although the disc will still be encrypted, there is no way of getting the key for a particular title ('Title Key' - funny old thing!).

You'd be forced to use 'Brute Force' to crack the key.

No 'legal' player does brute force - well, that I know of anyway.

[Doom9]

light: that's pretty much what I expected. But would there be a way to emulate this so that when the player tries to get the decryption key, it'll be provided with one (that could be extracted when copying the encrypted data)?

[LIGHTNING UK!]

Yup, that's totally possible.

The virtual drive would just need to know (via some sort of information file) the disc key, title keys, region codes etc. It could then feed them to the player when it asks.

[Doom9]

btw, the reason I'm asking is because of this: http://www.kaleidescape.com/system/

They claim to copy the entire DVD with CSS and keep the entire thing decrypted until playing it back. It's quite an expensive solution, but it is an interesting nevertheless, because the MPAA and DVD CCA seem to approve of that way of ripping (they have all the proper licenses)

[shaq141a]

Would it still be illegal?
There is a cracking in the protection or not?

[niann]

I thought that was how Alcohol 120% worked. I can take a CD and rip it all to my hard drive, and mount that image to a virtual drive. The program itself says it had the ability to do this with a DVD as well, although I have never tried it. I will give it a shot tonight when I get home from work.

Cheers!
-Niann

[Doom9]

There is a cracking in the protection or not?No, their player is licensed.. it does CSS descrambling just as any authorized software DVD player does.

I thought that was how Alcohol 120% worked.You missed a little but very important point that's up right on the frontpage of alcohol software:

* Due to the present legal restrictions DVD titles protected with CSS protection cannot be backed up.

[niann]

Yikes! Oops :) My bad, like I said I only use it for CDs I have never tried a DVD rip with it, and now I don't have to. =)

Cheers!
-Niann

[shaq141a]

But still the copying of the dvds keys in your hard drive wouldn't be illegal??

[Doom9]

But still the copying of the dvds keys in your hard drive wouldn't be illegal??Why? They have a license ;) The legally decrypt DVDs with it, get the key as every legit software player gets it.. it's all legit baby. If you cough up the money, certain organizations can get really friendly.

[dbernat32]

Actually based on Kaleidescape's website, it seems that the server does not do any decrypting. The DVDs are read bit for bit including CSS scrambling. Only the media players do the CSS decrypting.

Because it is technically easy to create a DVD-ROM drive capable of reading RAW 2056 bit sectors (or a writer for that matter), most likely that is exactly what the server contains.

Of course, if any commerical PC product had such capability, the manufacturer would be sued by the DVD Forum. However, such a product would not violate anti-decrypting laws. It would make a perfect copy of the disc, copy-protection and all.

In fact, all disc based copy-protections are supported only by the fact that the hardware capable of making them in the first place is artifically inflated to prices normal people cannot afford or stopped from entering the retail market.

--dbernat32