# Digital Signature

## Lock a user's private key

| Select Manager > Digital Signature > Administration. The Digital Signature Administration mask is opened.
| Select the Key tab.
| Click on the button D to display the data for the user DEMOEP.
| Select the entry.
| Click with the right mouse button on the highlighted entry and choose Lock Key from the context menu. The key status is changed to Locked by the system.
| The entries in the Locked Keys list are updated automatically.