A method is disclosed for performance by at least one server, for securing an electronic transaction request from a computing device for fraud detection. The request is received as a data packet comprising at least identification data of a payment card associated with the transaction and a MAC address of the computing device, is disclosed. The method comprises the server comparing the MAC address with at least a first list of MAC addresses to obtain a first determination; the server using the identification data to obtain at least one second determination; and the server transmitting a response to the computing device to accept or decline the request based on the first determination and the at least one second determination. A related computing device and server are also disclosed.