Did you just download a file that has a digital signature from Open Source Developer, Tim Kosse and wonder if the file is safe? If that's the case, please read on.
You will typically see Open Source Developer, Tim Kosse when double-clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can also view the Open Source Developer, Tim Kosse certificate with the following procedure:
Here is a screenshot of a file that has been digitally signed by Open Source Developer, Tim Kosse:

As you can see in the screenshot above, the Windows OS reports that "This digital signature is OK". This means that the file has been published by Open Source Developer, Tim Kosse and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also see the address for Open Source Developer, Tim Kosse, such as the street name, city and country.
Certum Level III CA has issued the Open Source Developer, Tim Kosse certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Open Source Developer, Tim Kosse files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/57 | fzshellext_64.dll |
| 0/56 | fzshellext_64.dll |
| 0/54 | fzshellext_64.dll |
| 0/56 | fzshellext_64.dll |
| 0/57 | fzshellext_64.dll |
| 0/57 | fzshellext_64.dll |
| 0/57 | fzshellext_64.dll |
| 0/54 | fzshellext.dll |
| 0/56 | fzshellext.dll |
| 0/56 | fzshellext_64.dll |
The detection percentage is based on the fact that I've collected 1007 scan reports for the Open Source Developer, Tim Kosse files. 0 of these scan reports came up with some sort of detection. If you like, you can view the full details of the scan reports by examining the files listed above.
The analysis is based on certificates with the following serial numbers: