An electronic access control device comprising: a radio communication module configured to perform a wireless data exchange in a first radio frequency band with a mobile device over a direct wireless communication link between the radio communication module and the mobile device ; a controller connected to the wireless radio communication module and configured to generate an access control signal using an access key received by the radio communication module via the direct wireless communication link from the mobile device ; and a proximity detector configured to detect a presence of a user of the mobile device in proximity (P) of the electronic access control device not using a radio frequency in the first radio frequency band; and the controller is connected to the proximity detector and further configured to control the radio communication module to establish the direct wireless communication link with the mobile device upon detection of the presence of the user by the proximity detector , for enabling the mobile device to transmit the access key to the radio communication module , characterized in that the controller is further configured to control the radio communication module to transmit to the mobile device an executable access confirmation module , the executable access confirmation module comprising computer program code configured to control a processor of the mobile device to receive from a user of the mobile device a confirmation instruction and to transmit to the radio communication module of the access control device a confirmation message responsive to the confirmation instruction; to receive the confirmation message from the mobile device ; and to generate the access control signal further using the confirmation message. a radio communication module configured to perform a wireless data exchange in a first radio frequency band with a mobile device over a direct wireless communication link between the radio communication module and the mobile device ; a controller connected to the wireless radio communication module and configured to generate an access control signal using an access key received by the radio communication module via the direct wireless communication link from the mobile device ; and a proximity detector configured to detect a presence of a user of the mobile device in proximity (P) of the electronic access control device not using a radio frequency in the first radio frequency band; and the controller is connected to the proximity detector and further configured to control the radio communication module to establish the direct wireless communication link with the mobile device upon detection of the presence of the user by the proximity detector , for enabling the mobile device to transmit the access key to the radio communication module , characterized in that the controller is further configured to control the radio communication module to transmit to the mobile device an executable access confirmation module , the executable access confirmation module comprising computer program code configured to control a processor of the mobile device to receive from a user of the mobile device a confirmation instruction and to transmit to the radio communication module of the access control device a confirmation message responsive to the confirmation instruction; to receive the confirmation message from the mobile device ; and to generate the access control signal further using the confirmation message. <EOS>