US Patent 11637825 Authentication with offline device

A first user device can transmit an interaction request to a remote computer via a long range communication channel. The first user device can receive an authentication request message from the remote computer and can then transmit the authentication request message to a second user device via a short range communication channel. The first user device can then receive an authentication response message comprising a response value from the second user device via the short range communication channel. The first user device can then transmit the authentication response message to the remote computer causing the remote computer to verify the response value and perform further processing if the response value is verified.