NFC verification
Reading the chip in a passport or ID card with a phone to confirm the document is genuine.
Near Field Communication (NFC) is the short-range radio technology used for contactless payments. Most modern passports and many ID cards contain an NFC chip that stores the holder's data and photo, signed by the issuing country. A smartphone can read that chip.
How it works
- The app reads the MRZ or card access number to unlock the chip.
- The user holds the document against the back of their phone.
- The app reads the data and face image from the chip.
- Passive authentication checks the issuing country's digital signature, so any change to the data is detected.
- Chip authentication or active authentication, where supported, shows the chip itself isn't cloned.
Why it is the strongest remote document check
A forger can imitate the look of a document, but not the country's cryptographic signature on the chip. The chip photo is also a better reference for face matching than a photo of the printed portrait.
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