Provided is a device comprising a frequency demodulator and an amplitude demodulator. The device is configured to use, in a first mode, both the frequency demodulator and the amplitude demodulator in parallel and to activate a radio frequency identification (RFID) card mode or a Qi charger mode based on results provided by said demodulators.

Provided is a device comprising a frequency demodulator and an amplitude demodulator. The device is configured to use, in a first mode, both the frequency demodulator and the amplitude demodulator in parallel and to activate a radio frequency identification (RFID) card mode or a Qi charger mode based on results provided by said demodulators.

Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.

Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.

Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.

Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.

Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.

Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.

Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.

Methods, Systems, and Computer program products can use grid telemetry to generate a fingerprint. One of these methods includes generating a first grid telemetry fingerprint based on characteristics of an electrical grid. The method also includes verifying a transaction based on the first grid telemetry fingerprint and a second grid telemetry fingerprint associated with the transaction.