WinWatch is using an RFID chip from Infineon Technologies in a sapphire face to add contactless payment to any analogue watch
(NFC) radio transceiver and coil-on-module (CoM) antenna for the RFID and is powered by the contactless terminal. The chip confirms the authenticity of the device with an individual signature and creates a cryptogram of card data, payment amount and place of payment. After successful verification, the bank confirms the payment to the reader.
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