When a master key for HDCP encryption surfaced last year, Intel hardly broke a sweat. It declared that nobody could use the key to unlock Blu-rays or other protected sources unless they got into the semiconductor business and "made a computer chip" of their own. Oh Mann, didn't they realize? That sort of language is like a red rag to a German post-grad, and now Ruhr University's Secure Hardware Group has produced the ultimate rebuttal: a custom board that uses a field programmable gate array (