Securing radio-frequency identification systems

摘要

In one embodiment, a method includes, by a base station, communicating a challenge to a transponder through a first communication link; and establishing a second communication link with the transponder. The second communication link is a capacitive link. The method also includes receiving a first response to the challenge through the first communication link with the transponder; sampling the second communication link to detect a signal corresponding to a second response to the challenge from the transponder; receiving the second response through the second communication link; and authorizing the transponder based on the first and second responses.

主权项

1. A method comprising:
by a base station, communicating a challenge to a transponder through a first communication link, the first communication link being a radio frequency communication link; establishing a second communication link with the transponder, the second communication link being a capacitive link; receiving a first response to the challenge through the first communication link with the transponder; sampling the second communication link to detect two or more signals corresponding to a second response to the challenge from the transponder, the second response including an authentication code, wherein the two or more signals are transmitted by the transponder with different frequencies and encode different portions of the authentication code; and authorizing the transponder based on the first and second responses.