Looking at them you might not guess it. But deep in a basement room on the University of Toronto campus, three unassuming computer hackers with messy hair and wrinkled T-shirts are working to tear down China's "Great Firewall," the most sophisticated Internet censorship system in the world.

They are self-confessed computer "geeks." They don't go to the gym much, or see much sunlight. They talk about "routers" and "nodes" and "secure socket layers" like they were saying, "Hello," or "How are you?"

At the Toronto Star.

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