Mastercard launches ‘smile to pay’ system amid privacy concerns - The Guardian

The company’s stab at the biometrics checkout market has raised debate about data storage and tracking

Mastercard is rolling out a controversial programme that will allow shoppers to pay at the till with a mere smile or wave of the hand, as it tries to secure a slice of the $18bn (£14.4bn) biometrics … [+2540 chars]

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