Can someone hack your NFC business card?
The main 'hack' risk for NFC business cards is someone overwriting the chip with a different URL — possible if the chip is left writable. Reputable platforms lock the chip to prevent this. Reading the chip (just getting the URL) requires physical proximity under 4 cm.
Chip overwriting: the main risk
NFC chips can be written to with an NFC writer app. If a chip isn't write-locked, anyone with an NFC-capable phone and a free app could overwrite it with a new URL — potentially pointing to a malicious site. This is why professional NFC business card platforms lock the chip during manufacturing. A write-locked chip can be read but not overwritten.
Eavesdropping: theoretical but impractical
Someone with specialized NFC eavesdropping equipment could theoretically intercept an NFC transaction from a few centimeters away. In practice, all that would reveal is a public URL — the same URL printed on the card's QR code, publicly accessible to anyone. There's no sensitive data in the chip to intercept.
Replay attacks: not applicable
In payment NFC, replay attacks (capturing and reusing a payment token) are a real concern — that's why payment cards use one-time cryptographic tokens. NFC business card chips don't use authentication or tokens. But there's nothing valuable in them to replay — they just store a URL.
How do I know if my NFC business card chip is write-locked?
Most platforms lock chips by default. You can check with an NFC writer app — if you try to write to the chip and get a 'write protected' error, it's locked.
What should I do if my NFC card is pointing to a strange website?
If someone has overwritten an unlocked chip, contact your platform to reissue the card. For a locked chip, the URL can't be changed — the problem would be with the profile page, not the chip.
Can someone use my NFC card details to steal my identity?
The chip contains only a public URL. Your profile page contains only what you've chosen to share publicly. There's no identity theft risk from the NFC technology itself.