| 主权项 |
1. A method of authenticating field devices, the method comprising:
manufacturing the field devices, each field device configured for use in an industrial process monitoring or control system, wherein the manufacturing includes:
applying a barcode to each field device that uniquely identifies the respective field device;reading, by a reader device, the barcode applied to each field device to uniquely identify each field device;creating, for each field device, a unique encrypted authentication code based on a private key and device specific information relating to the uniquely identified field device;storing, for each field device in a database, the unique encrypted authentication code and the device specific information for the field device associated with the unique encrypted authentication code; andstoring, on each field device, a readable representation of the unique encrypted authentication code for that field device, wherein the readable representation of the unique encrypted authentication code is in encrypted form that requires decryption with the private key; receiving a request for product authentication that includes the unique encrypted authentication code stored on a field device in question; and providing an indication of authenticity of the field device in question based upon the unique encrypted authentication code received with the request and the stored device specific information associated with that unique encrypted authentication code in the database, wherein providing the indication of authenticity includes:
providing an indication that the field device in question is not authentic if the unique encrypted authentication code is not stored in the database;providing an indication that the field device in question is authentic if the unique encrypted authentication code is stored in the database; andproviding an indication that clones of the field device may exist if multiple requests with the same unique encrypted authentication code have been received. |
