The invisible physics powering your contactless credit card payments
In short: Tap to pay feels like magic because the card has no battery or wires. This video deconstructs that illusion, slowing down a one-second transaction to reveal the complex engineering and cryptography required to move money wirelessly.
The video explores how a payment terminal generates a 13.56 MHz magnetic field to power up your credit card instantly. It explains the technical mechanisms of amplitude and load modulation used to transmit data between the card and the reader.
Beyond simple transactions, the content unpacks the cryptography that prevents fraud and examines related technologies like smartphone payments, hotel key cards, ID badges, and the broader world of RFID.
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Sources
- Summary by Intellect · source: How does Tap to Pay Work?
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