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HOWTO subject HDCP crippleware for video to attack

Cory Doctorow at 4:22 pm Fri, Apr 14, 2006

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As part of his ongoing series on the failings in the HDCP video crippleware being build into HD TVs, video-game consoles and PCs, Princeton engineering prof Ed Felten describes how easy it is to subvert the system:
...[I]t has a very large problem: if any [forty] devices conspire, they can break the security of the system.

To see how, let’s do an example. Suppose that Alice, Bob, Charlie, and Diane conspire, and that the conspiracy wants to figure out the secret vector of some innocent victim, Ed. Ed’s addition rule is “[1]+[4]”, and his secret vector is, of course, a secret.

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I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.

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