The team paid particular attention to samples taken from the Khoi and San people of southern Africa.

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Khoi Nguyen, a group product manager for security provider Symantec, said that in a world of sophisticated online technology, smartphone users are most likely to fall prey to a more basic attack -- old-fashioned theft.

CNN: Smartphone security threats likely to rise

On a brilliant morning last October Dong Khoi Street, the premier commercial thoroughfare in Saigon, was closed for nearly two hours to celebrate the opening of Vincom Center A, a precisely, if infelicitously, named shopping center.

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But if Woods and McIlroy are to become truly great adversaries along the lines of Nicklaus-Tom Watson and Ben Hogan-Sam Snead then they can't afford to become too cosy, according to sports leadership expert Khoi Tu.

CNN: December 6, 2012 -- Updated 1403 GMT (2203 HKT)