For banking, such lax security measures would be laughable. But for shops it is more than adequate, says Mr Thieme. In a shop, where the scanner sits by the till and is supervised by a clerk, a thief could not make repeated payment attempts without raising suspicion, so false positives are unlikely. In addition, the mere incorporation of biometrics into the payment system is likely to deter criminals, says Mike Bond, an expert in banking security at Cambridge University. And even if the system can be beaten occasionally, it may not matter. “If companies can make more money by getting people through checkout more quickly, then it's possible they could offset any losses incurred through fraud,” he says.
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