“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,”
Amazon ‘s submission to the US Patent and Trademark Office
said.”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.”The e-commerce firm added that
shortcuts for remembering passwords
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