SYSTEMS AND METHODS FOR VERIFYING REMOTE DEVICE PROXIMITY IN RFID SYSTEMS

Systems and methods for verifying remote device proximity in RFID systems are described. To reduce the risk of relay attacks, a terminal may determine a distance of a remote device from the terminal. The terminal may send a computational challenge to the remote device and determine whether a latency of the response is within a maximum acceptable latency, indicating that the remote device is within a maximum acceptable distance. The maximum acceptable latency may be dynamically determined based on context information, such as a time of day, that may be correlated with a likelihood of attempted unauthorized accesses. The terminal may determine whether to perform an action associated with the remote device based on whether the response was received within the maximum acceptable latency.