Is NFC safer than Bluetooth for sharing contact information?
For contact sharing, NFC is generally considered safer than Bluetooth. NFC's 4 cm maximum range makes unauthorized interception extremely difficult. Bluetooth's longer range (up to 10+ meters) and pairing complexity introduce more attack surface.
NFC security advantages
Physical proximity requirement: you can't intercept NFC from across the room. No pairing process to exploit. No persistent connection to eavesdrop on. The entire transaction completes in under a second, leaving minimal time for interception. The data exchanged (a URL) is public information to begin with.
Bluetooth security considerations
Bluetooth operates at much longer ranges, making remote interception more feasible. Bluetooth pairing protocols have historically had vulnerabilities (BlueBorne, BlueSnarfing, etc.). A persistent Bluetooth connection maintains an open channel that can be a target for ongoing attacks. For a brief contact exchange, Bluetooth's attack surface is larger than NFC's.
Can someone intercept an NFC card transfer?
In theory, with specialized high-power equipment at very close range. In practice, the data exchanged is a public URL, so interception yields nothing useful.
Is NFC safe enough for enterprise use?
For contact sharing: yes. For payment or access control: NFC with proper authentication (as used in payment terminals and secure badge readers) is enterprise-grade.
Does NFC support end-to-end encryption?
Not on standard business card chips. Encryption is added at the application layer (HTTPS on the profile page). The chip-to-phone transfer is not encrypted.