Amazon has filed a patent application to allow users to pay for items by taking a selfie.
The firm argues the move would improve people's security as they carry out more and more tasks online.
"While many conventional approaches rely on password entry for user authentication, these passwords can be stolen or discovered by other persons who can impersonate the user for any of a variety of tasks," the application states.
"Further, the entry of these passwords on portable devices is not user friendly in many cases, as the small touchscreen or keyboard elements can be difficult to accurately select using a relatively large human finger, and can require the user to turn away from friends or co-workers when entering a password, which can be awkward or embarrassing in many situations."
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