Did you just find a download or a file on your computer that has been digitally signed by International GeoGebra Institute? If that's the case, please read on.
You'll typically notice International GeoGebra Institute when clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screencap shows:

You can view the additional details from the International GeoGebra Institute digital signature with the following procedure:
Here's a screenshot of a file digitally signed by International GeoGebra Institute:

As you can see in the screengrab above, the Windows OS states that "This digital signature is OK". This means that the file has been published by International GeoGebra Institute and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can view 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 view the address for International GeoGebra Institute, such as the street name, city and country.
GlobalSign CodeSigning CA - SHA256 - G2 has issued the International GeoGebra Institute certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the International GeoGebra Institute files I have collected, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the International GeoGebra Institute files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by International GeoGebra Institute.
| Detection Ratio | File Name |
|---|---|
| Not available | GeoGebra-Windows-Installer-5-0-265-0.exe |
The analysis is based on certificates with the following serial numbers: