| 摘要 |
A method for activating special functionalities in field devices used in automation technology uses an activation code, encrypted with a private key and containing an activation option and field-device-specific information transferred to a field device. Decrypting of the activation code occurs with a public key stored in the field device. Then, the field-device-specific information contained in the activation code is compared with information stored in the field device. If these two pieces of information, match, then the activation option in the activation code is ascertained, and the corresponding special functionality is activated. This method makes it possible to activate special functionalities securely in field devices.
|
