AirPlay, Apple TV authentication and protected iTunes content

Erica continues her hacking explorations into the Apple TV and AirPlay.

Here's the thing. As far as I can tell, you can play back any content that plays back in your iPhone's iPod and video applications on any Apple TV. That includes DRM content, all that encrypted stuff that normally requires you to register your computer with your iTunes account.

Somehow the AirPlay protocol sends over enough information to the Apple TV to allow that device to gain at least temporary authorization to play the media you stream to it. From what I've been able to find out, that authentication step seems to be transmitted via a simple key using a message that looks something like this...

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AirPlay, Apple TV authentication and protected iTunes content originally appeared on TUAW on Tue, 21 Dec 2010 21:15:00 EST. Please see our terms for use of feeds.

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