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vCard, also known as VCF (Virtual Contact File), is a file format standard for electronic business cards. vCards can be attached to e-mail messages, sent via Multimedia Messaging Service (MMS), on the World Wide Web, instant messaging, NFC or through QR code.
Digital contact tracing is a method of contact tracing relying on tracking systems, most often based on mobile devices, to determine contact between an infected patient and a user. [2] It came to public prominence in the form of COVID-19 apps during the COVID-19 pandemic .
The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [6] [7] [8] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [9] the pattern of the position detection markers was determined by finding the least-used sequence of ...
Identification with a digital card is usually done in several ways: Displaying a QR code on the customer's smartphone to the identifying host (a cashier i.e.). The unique QR code ensures privacy for every customer. Engaging an NFC protocol connection by placing the smartphone near the NFC Reader (using host card emulation method).
It uses a digital contact tracing protocol called BlueTrace, developed with an open source reference implementation called OpenTrace. [196] South Africa COVID AlertSA is a digital contact tracing app announced by the Government of South Africa on 8 August 2020 to help combat the ongoing COVID-19 pandemic. Spain
A larger digital display, for OTP or balance, QR code; An alphanumeric display, ... Contact smart cards have a contact area of approximately 1 square centimetre ...
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