AACS also has the ability to degrade the high definition video signal sent to a TV or monitor if the user has an unprotected digital or analogue connection between a player and display device. But Ayres says most studios have indicated they won't use this facility and if they do, it will have to be highlighted on software packaging.
Objections
But such assurances have not placated everyone.
"The most objectionable aspect of AACS is that it allows the seller to retain control of the use of the disc forever," Evangelist says.
"They can determine what devices will play it, how and where it can be copied and used, and even change the quality of the output depending on whether or not the devices are `approved.' The providers can change the rules whenever they like. You will no longer have any certainty about what you can do with your own property, now or in the future."
Schoen adds: "It's conceptually creepy that someone can take away functionality from a product after you bought it. That said, this particular problem is now pervasive in high technology, not just in DRM. A mobile-phone carrier can take away functionality from a phone after you bought it. If you use a non-open source operating system, your operating system developer can take away functionality from your computer afterwards. So this is a broad trend and I would not single out AACS revocation for unique criticism."
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