| 摘要 |
PROBLEM TO BE SOLVED: To provide a system and method for securing controllers that prevents the controllers from being used in an unauthorized manner or by unauthorized users.SOLUTION: A system includes a controller and a certificate authority. The controller is configured to control a process. The certificate authority (CA) is configured to issue and to revoke certificates, where the controller is configured to use the CA to mutually authenticate a user to enter into a secure mode of operation. |
