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The source blog post suggests it's exactly that. Whether that's scary or not depends on your perspective - I doubt it will prevent any material from leaking ou
by comex 13y ago
The source blog post suggests it's exactly that. Whether that's scary or not depends on your perspective - I doubt it will prevent any material from leaking out, but it certainly could encourage companies to restrict video playback to devices that support the feature, which would be rather annoying for users of other devices. That is, if manufacturers bother to actually use it...
- tptacek 13y agoAt this point in the development of ARM, an argument against TZ-aware video blocks is basically an argument that ARMH should deliberately hamstring its IP blocks to prevent them from being used to implement content protection, right? TZ isn't spooky DRM technology.
- comex 13y agoTZ in video decoders has little use other than content protection, and ARM is explicitly positioning it for use as such. While the article is certainly very hyperbolic, and many more steps will need to be taken before an annoying scenario of the type I described is likely to come to pass, I think it is a valid concern.
- tptacek 13y agoAny security feature in a video decoder is going to be designed for rightsholders. :) If you're concerned about content protection, the inevitability of hardware-assisted content protection as hardware security improves is a valid concern. But since TZ is (a) a technology with more non-DRM uses than DRM uses and (b) a fundamental part of the overall ARM architecture, not extending it to other ARM IP blocks would have been an odd choice. That's all I'm saying.
- cabalamat 13y ago> it certainly could encourage companies to restrict video playback to devices that support the feature So if I want to buy a legal download, I'll have all sorts of hassle along the lines of "will it work on my hardware?", but if I get a pirate Torrent, then I know it'll work? If that's the scenario, I won't even consider going the legal route.