Macrovision Buys Broken Blu-ray DRM Tech for $45 Million

Illustration for article titled Macrovision Buys Broken Blu-ray DRM Tech for $45 Million

While both Blu-ray and HD DVD use the long-cracked AACS copy protection scheme, Blu-ray has its unique flavor of DRM underneath that, BD+, which is based on the Self-Protecting Digital Content spec. Macrovision is plunking down $45 million for SPDC and its related patents. This is despite the fact BD+ was cracked by AnyDVD's daddy, Slysoft, a couple weeks ago. So why drop that much dough on cracked tech?

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Licensing. Even if the formerly uncrackable scheme has been busted wide open, Macrovision is looking at piles of revenue from licenses paid by studios to use BD+. It'll then go about playing the never-ending copy-protection cat-and-mouse game with crackers and hackers. It's comforting to know some things never change. [Ars]

DISCUSSION

@phijef: It seems to me that if that were true then there would need to be an update to the Bluray Player every time there was a new Bluray release and in a couple of years the huge list of encryption keys stored on the machine would be way bigger than anything other than a PS3 could hold.

Also, they can't change the encryption key for old releases. The movie is already encrypted with an encryption key. Once its encrypted and burnt, you can't re-encrypt it with a different key without burning a new disc.

The way HD-DVD changed the key is that all HD-DVDs that came out from then on had a new HD-DVD, but all the old movies still had the old encryption key.

At least, this is how I understand it.