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Stephen Sackur speaks to the accused computer hacker Lauri Love. For nations, corporations and all of us as individuals, the age of the internet has heightened vulnerability. Information and data - the most valuable of all commodities - are at risk from hackers, motivated by greed or national or ideological interest. Lauri Love was, from childhood, a gifted computer geek who joined a so-called hacktivist collective. He was charged with hacking secrets from the US military, and narrowly avoided extradition. What does his case tell us about the realities of cyber security?