A fingerprint, a machine readable identifier, is also a physical world hyperlink and can be used for mcommerce.
Fingerprints as digital payments
A customer pays by putting his fingerprint on a special scanner instead of paying with cash or credit cards, in the Edeka supermarket in the western town of Grosen-Buseck, in December 2006.
The new system that scans customers' fingerprints and deducts the grocery bill from their bank accounts has taken supermarkets in southwestern Germany by storm and is being picked up by hardware stores, school canteens and even the country's ubiquitous beer gardens.
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