Participants in an ethical hacking contest at a Swiss security conference in Geneva in March. So-called bug bounty programs are becoming very popular in Silicon Valley's high-tech sector. Salvatore Di Nolfi/EPA/Landov hide caption

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A money changer sits behind piles of banknotes in Hargeisa in Somaliland, an autonomous, relatively peaceful region in northern Somalia. The self-declared nation of Somaliland, like Somalia itself, lacks a formal banking system, and residents rely on hawaladars to receive money from abroad. Simon Maina/AFP/Getty Images hide caption

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EU Competition Commissioner Joaquin Almunia announces fines against eight large banks, in a scandal over rigging interest rates. Georges Gobet/AFP/Getty Images hide caption

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This photo dated October 24th, 1929, shows a view of people rushing to a saving bank in Millbury, Massachusetts as the stock market on Wall Street crashed, sparking a run on banks that spread across the country. AFP/AFP/Getty Images hide caption

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