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Does the app produce a unique coded signal of flashing screen colours for each user? Otherwise, what's to stop someone from loading an image of their own face

by kupo 16y ago

Does the app produce a unique coded signal of flashing screen colours for each user? Otherwise, what's to stop someone from loading an image of their own face with someone else's barcode onto their smartphone and stealing sandwiches?

thinkcomp 16y ago
The photo appears on the register (downloaded from our server each time you check out) in front of the cashier. The photo on the phone is just for aesthetics.
- drinian 16y ago
  Can't wait to see that get abused.