Abstract: 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.

Abstract: A method for exchanging data between several field devices includes: implementing an exchange of data between a requesting field device and a responding field device using a publish-subscribe principle; subscribing the responding field device to request messages whose message titles include a specification of a field device identifier of the responding field device; subscribing the requesting field device to response messages whose message titles include a request identifier known to the requesting field device; the requesting field device publishing a request message to a data broker, the message title of the request message including the request identifier and the specification; the responding field device receiving the request message, evaluating the request message, and publishing a corresponding response message to the data broker, the message title of the response message including the request identifier; and the requesting field device receiving the response message based on the subscription to the res

Abstract: A method for exchanging data between several field devices includes: implementing an exchange of data between a requesting field device and a responding field device using a publish-subscribe principle; subscribing the responding field device to request messages whose message titles include a specification of a field device identifier of the responding field device; subscribing the requesting field device to response messages whose message titles include a request identifier known to the requesting field device; the requesting field device publishing a request message to a data broker, the message title of the request message including the request identifier and the specification; the responding field device receiving the request message, evaluating the request message, and publishing a corresponding response message to the data broker, the message title of the response message including the request identifier; and the requesting field device receiving the response message based on the subscription to the res

Abstract: A method for permission-dependent communication between a field device of automation technology and an operating device. The method includes: in the event that the operating device has permission from a permission provider to communicate with the field device, storing on the operating device a cryptographic verification datum which is dependent on the field device identifier; receiving at the operating device the field device identifier from the field device in preparation for communication with the field device; using a cryptographic comparison step to check whether the verification datum depends, in an unambiguous manner, on the field device identifier which the operating device has received from the field device; and using the operating device to communicate with the field device only in the event that the verification datum depends, in an unambiguous manner, on the field device identifier which the operating device has received from the field device.

Abstract: 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.