A system for securing contactless communications with an external device is provided. The system has an operating device for performing at least one of production and testing operations. A controlling device is coupled operationally to the operating device; a receiving device configured to receive first data from the external device. A unidirectional network is configured to allow communication of the first data from the receiving device to the controlling device. The controlling device is configured to control the at least one of production and testing operations performed by the operating device on the basis of the first data.