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mikejuk writes "Researchers have devised and tested a system called Theia that can perform an efficient parallel search of mobile phones to track down a target photo. It could be used to perform a realtime search for a missing child accidently caught in a photo you have just taken or the location of a criminal or political activist. You might think that the security and privacy aspects were so terrible that you just wouldn't install the app. However exceptional photos of a sporting or news incidents are worth money and the profit motive might be enough for you to install it."
"What is wanted is not the will to believe, but the will to find out, which is
the exact opposite."
-- Bertrand Russell, _Sceptical_Essays_, 1928