Half a croissant, on a plate, with a sign in front of it saying '50c'
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Use your smartphone to identify yourself to physical sellers

Use phone to scan your identity to seller
 
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During purchase of physical goods, use your phone to scan QR codes and transmit your identify to the seller when checking out items in shopping aisles. Coupled with automated video recognition to reduce checkout fraud.

Physical shopping counterpart of this other Halfbakery idea: 'Use your smartphone to login to websites' .

sonam, Apr 25 2017

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       I don't get it... why does the seller need to know my identity? I thought all they need is my cash before I walk out of their store.
ixnaum, Apr 26 2017
  

       sonam, we've seen Minority Report
theircompetitor, Apr 26 2017
  

       SQRL should be easily adaptable to this (if it hasn't been adapted already).
notexactly, Apr 27 2017
  

       //why does the seller need to know my identity? I thought all they need is my cash before I walk out of their store.//   

       I'd prefer this as I have many more identities than I have cash.
AusCan531, Apr 27 2017
  
      
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