Power-based card verification handshake

A non-transitory computer-readable storage medium, the computer-readable storage medium including instructions that when executed by a processor of a card, cause the processor to:

• determine a predetermined voltage associated with the card;
• receive an indication of a voltage received from a terminal, wherein the card is powered at least in part by the voltage received from the terminal;
• determine that the voltage received from the terminal is less than the predetermined voltage associated with the card;
• and
• reject, based on the determination that the voltage received from the terminal is less than the predetermined voltage associated with the card, a request from the terminal to provide payment information associated with the card.

A card, comprising:

• a processor;
• and
• a memory storing instructions that, when executed by the processor, cause the processor to:
• determine a predetermined power characteristic associated with the card;
• receive an indication of a characteristic of a power signal received from a terminal, wherein the card is powered at least in part by the power signal received from the terminal;
• determine that the characteristic of the power signal does not equal the predetermined power characteristic associated with the card;
• and
• reject, based on the determination that the characteristic of the power signal does not equal the predetermined power characteristic associated with the card, a request from the terminal to provide payment information associated with the card.