| 摘要 |
<p>The invention relates to a method for the cryptographic protection of data communication of a field device (11), comprising the steps of identifying the field device (11) by means of a communications device (12) using the identification code of the field device (11), selecting a VPN configuration associated with the identified field device (11) by means of the communications device (12), establishing a VPN link (15a) based on the selected VPN configuration by means of the communications device (12), and transmitting control data to the VPN server (16) via the established VPN link by means of the field device (11).</p> |
