1. A smart card for authenticating a person holding said smart card, said smart card comprising: a substrate; a sensor module provided on said substrate, said sensor module including: a biometric sensor adapted to detect biometric information from the person's body; a processor unit coupled to said biometric sensor, said processor unit adapted to authenticate the person in response to the detected biometric information and generate an authentication signal representing an authentication result; and a memory coupled to said processor unit, said memory adapted to store biometric information of a specific individual associated with the smart card; a wireless transceiver module coupled to said processor unit, said wireless transceiver module adapted to transmit signals received from said processor unit and receive a wirelessly-transmitted power signal; and a power circuit provided on said substrate, said power circuit adapted to generate at least one supply voltage from the received power signal and provide the supply voltage to said sensor module.