Systems and methods for performing transactions with contactless cards

A method for transmitting data by a contactless card having a processor and a memory, the memory containing a card key, the method comprising:

• generating a cryptogram;
• encrypting the cryptogram using the card key;
• transmitting the encrypted cryptogram;
• and
• transmitting a tap password, wherein the tap password comprises a plurality of taps of the contactless card on a receiving device.

A data transmission system comprising:

• a contactless card comprising:
• a processor;
• and
• a memory, the memory of the contactless card containing a card key,
• wherein the contactless card is configured to:
• generate a cryptogram,
• encrypt the cryptogram,
• transmit the encrypted cryptogram, and
• transmit a tap password, wherein the tap password comprises a plurality of taps of the contactless card on a receiving device.

A server, comprising:

• a processor, and
• a memory, the memory containing a key, a reference tap password, and an application comprising instructions for execution by the processor,
• wherein, the application is configured to:
• receive an encrypted cryptogram,
• decrypt the encrypted cryptogram using the key,
• request a tap password, the tap password comprising a plurality of taps of a contactless card,
• receive a tap password,
• compare the tap password to the reference password, and
• upon determining that the tap password matches the reference password, authorize a transaction.