And in the meantime he's been spending his days on a hobby that periodically stuns the computer security world: seeking out cracks in the source code of Apple's iPhone, a device with more software restrictions than practically any computer on the market, and utterly obliterating its defenses against hackers.

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"I call it Homebrew Health, " says one angel investor, alluding to the Homebrew Computer Club of the 1970s, the group of electronic enthusiasts, including Steve Jobs and Steve Wozniak, whose technology hobby led to the birth of the personal computer.

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"It's kind of a hobby, " says "Wukong, " a computer professional and habitual file-sharer, who asked to remain anonymous.

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M. personal computer and then the Mac were born, computers became his hobby.

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