# Digital Signature

## Unlock a user's private key

| Select Manager > Digital Signature > Administration. The Digital Signature Administration mask is opened.
| Select the Locked Keys tab.
| Select the entry DEMOEP.
| Click on the highlighted entry with the right mouse button and choose Unlock Key from the context menu. The key status will be changed to Not verified by the system.
| You can also assign a new key to a user. This is useful for example when the original key is invalid (and is therefore automatically disabled). As an alternative you can also enable a disabled key in a key directory.