Siemens SIMATIC HMI Industrial Thin Client ITC1200, Руководство по эксплуатации

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Assigning device parameters
5.4 Remote configuration of several devices
Industrial Thin Client ITC1200, ITC1500, ITC1900, ITC2200
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Operating Instructions, 04/2013, A5E03474888-02
5.4.6 Assigning a key
Generating a new key pair
A pair of private and public keys provides security for remote updating and remote
configuration. The public key is installed by default on the device. If you install the remote
configuration on a PC, the private default key is stored in the device directory.
NOTICE
Danger of data misuse
The default private key file is the same for each device. Generate a new global key pair for
each device. Only the new key pair can then be used.
Use the "Generate key" button to generate a new global pair of keys for each selected
device: The new public key is always installed on the device. The new private key file is
stored on the PC in the device directory. The old key file is backed up.
Restoring keys
Note
No remote access
The remote configuration can no longer be used to access the device in the following cases
("Error" status):

The public key has been deleted.
 The device was secured on site by a local, individual key pair.

A new key pair has been generated remotely on another PC.
In this case, restore the factory settings by choosing one of the following procedures:
 On the device on site.

Via remote configuration in the configuration settings of the device under "System
settings (Page 41)".
Additional information is available on the Internet in the product information "Remote
configuration and remote update
The action contains the "Info" status with a status message prompting you to generate a new
global pair of keys using the "Generate key" button.