American Express Company
Transaction device use of a dynamically generated value based on a next expected session key

Abstract:

A system, method, and computer readable medium (collectively, the "system") are provided. The system may include a processor configured to perform operations and/or steps comprising receiving a wireless signal from a transaction device, wherein the wireless signal carries emulated track data for payment of a transaction; reading the emulated track data from the wireless signal; generating a transaction payload, wherein the transaction payload contains transaction account data and a dynamically generated digital signature value from the emulated track data of the wireless signal; transmitting the transaction payload to an authorization network server; receiving an authorization instruction from the authorization network server for handling payment of the transaction; and processing the payment of the transaction in accordance with the authorization instruction.