A brazen gang of cyber criminals, who stole $45 million from bank ATMs in 27 countries, exposes an Achilles heel in the global financial industry: prepaid debit cards. Cyber security experts and industry analysts say the burgeoning use of prepaid debit cards for everything from gift certificates to disaster relief handouts is making it easier for hackers to withdraw large amounts of money before detection. Prepaid cards have fewer controls on them than on regular credit and debit cards issued by banks. Each prepaid card issued is like a blank slate: anonymous, new, and lacking any credit history or individual behavior pattern against which bankers and payment processors can measure activity to look for red flags. They are also easier to hack. Raising a withdrawal limit on a prepaid card involves hacking into a system at a third-party payment processor, a company that is generally smaller than a bank and, if based outside the United States, potentially subject to looser cyber security
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