US Patent 11861604 Systems and methods for cryptographic authentication of contactless cards

Example embodiments of systems and methods for data transmission between a contactless card and a client device in support of a FIDO authentication are provided. In an embodiment, upon receipt of a challenge issued by a server in connection with a pending transaction, the contactless card may authorize the client device to utilize a FIDO private key to respond to the challenge. If the response to the challenge is successful, the FIDO authentication may proceed and the transaction may be completed.