I recall we looked at this, as well as retina scans, for identification. Less perception of invasion perceived with palms, but also had some other issues. Maintaining changes would be one issue.
Amazon wants to patent technology that could identify shoppers by their hands
The system could someday be used in Amazon Go or Whole Foods stores.
By Jason Del Rey@DelRey in Vox
Today, visitors to Amazon Go cashierless stores need to scan an app to get in. In the future, Amazon may instead ask to just scan their hands instead.
The US Patent and Trademark Office published a patent application from Amazon on Thursday for a touchless scanning system that would identify people not by their faces but by characteristics associated with the palms of their hands, including wrinkles and veins. ..... "
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