| 摘要 |
Disclosed is a personalized security system for use with a PDA or other portable electronic device. An interrogator signal is transmitted from the portable electronic device, triggering a responsive transmission of a password from an electronic key carried by the wearer. Certain selected functions or all functions of the electronic device are therefore only enabled if the electronic device is within a predetermined operating proximity of the electronic key. Also disclosed is a personal preference monitoring system, for allowing personal preferences to be automatically implemented in response to a user passing within a predetermined distance of an interrogation signal transmitter.
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