Did you just run into a download or a file on your computer that has a digital signature from INTENIUM GmbH? If so, please read on.
You will typically see INTENIUM GmbH when running the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the digital signature details for INTENIUM GmbH with the following procedure:
Here's a screencap of a file signed by INTENIUM GmbH:

As you can see in the screengrab above, Windows states that "This digital signature is OK". This implies that the file has been published by INTENIUM GmbH and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can examine all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also examine the address for INTENIUM GmbH, such as the street name, city and country.
COMODO Code Signing CA 2 has issued the INTENIUM GmbH certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screengrab above.
The following are the INTENIUM GmbH files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/54 | GameCenterNotifier.exe |
| 0/54 | GameCenterNotifier.exe |
| 0/67 | GameCenterWatchDog.exe |
The detection percentage is based on that I've gathered 175 scan results for the INTENIUM GmbH files. 0 of these scan results came up with some sort of detection. You can review the full details of the scan results by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: