| 摘要 |
A system and method for wirelessly exchanging an encryption key between a first device and a second device. The system generally includes: a transmitter, provided to the first device, for transmitting a signal that is strong enough to transmit over a predetermined distance while having a strength that decreases exponentially with distance, for example a magnetic field signal; a receiver, for example a Hall effect switch, provided to the second device, for receiving the signal; and a controller for determining when the first device and the second device are within the predetermined distance and controlling the transmitter to transmit the encryption key based on the determination.
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