Method for secure communication with a process measuring field measuring device and corresponding field measuring device

摘要

A method (2) for secure communication with a field measuring device (1) of the process technology is described and illustrated, wherein the field measuring device (1) has a sensor (3), an evaluation unit (4) and a communication unit (5) with a communication interface (6). wherein a web server (7) is implemented on the communication unit (5), wherein the web server (7) can be accessed externally by means of the communication interface (6) and a corresponding field measuring device (1). Abusive access to the field measurement device by means of the communication interface (6) with a web server (7) is prevented with high certainty by contacting the web server (7) via the communication interface (6) when contacting (100) by an external communication means (8). a first authenticity check (101) of the external communication means (8) is carried out by the field measurement device (1) and a second authenticity check (102) of the external communication means (8) is carried out and after successful completion (103) of the first authentication check (101) and the second authenticity check (102) from the field meter (1) a further communication (104) with the external communication means (8) with the web server (7) authorized (105).