METHOD FOR CHECKING THE AUTHENTICITY OF ELECTRONIC MODULES OF A MODULAR FIELD DEVICE IN AUTOMATION TECHNOLOGY

摘要

A method for checking the authenticity of electronic modules is disclosed. Each electronic module is assigned a key pair confirming the identity of the electronic module, wherein each key pair consists of a public key and a private key, and wherein the public keys of the key pairs are stored in a list. The list is assigned to the field device, and: when an electronic module is exchanged or added, the field device checks: whether the exchanged or added electronic module has a key pair, and whether the public key of the exchanged or added electronic module is listed in the list of public keys, and whether the electronic module is in possession of the correct private key. Interaction of the changed electronic module with the field device concerning the functionality of the field device is permitted if the check is concluded with a positive result.