Protection of near-field communication exchanges

摘要

Techniques are disclosed for protecting communication of an NFC-enabled device by generating one or more blocking signals during an NFC data exchange. The blocking signal(s) can include a similar carrier frequency, modulation type, and/or modulation rate an NFC signal, thereby effectively masking the NFC signal. Furthermore, the blocking signal(s) can have a varying amplitude and/or length, which can further mask when an NFC signal is transmitted.

主权项

1. A transmitter for protecting a first near-field communication (NFC) signal transmitted by a mobile device, the transmitter comprising:
a first transmit circuit configured to generate the first NFC signal; a second transmit circuit configured to:
generate a first blocking signal having a carrier frequency of the first NFC signal; andmodulate the first blocking signal with a type of amplitude modulation of the first NFC signal; and an NFC antenna:
communicatively coupled with the first transmit circuit so as to transmit the first NFC signal, andconfigured to be coupled with the mobile device; and a second antenna:
communicatively coupled to the second transmit circuit so as to transmit the first blocking signal while the first NFC signal is transmitted, andconfigured to be coupled with the mobile device.