Method for Secure Communication Between a Field Device of Automation Technology and an End Device as well as a System for Secure Communication Between a Field Device and an End Device

摘要

A method for secure communication between a field device and an end device is disclosed. The method includes: storing an individual access code in the end device, transmitting an access code of the end device to the field device, connecting the field device to an authentication server via a server communication link, using the field device to transmit the access code or an access code derived from the access code to the authentication server, storing authentication data on the authentication server, checking the authenticity of the access code on the authentication server using the authentication data, transmitting the resulting authentication result from the authentication server via the server communication link to the field device, and, depending on the authentication result transmitted to the field device, making resources of the field device available to the end device.