Did you just stumble upon a download or a file on your computer that is digitally signed by SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA? If that's the case, please read on.
You will probably see SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA when double-clicking to run the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can also view the SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA certificate with the following procedure:
Here is a screenshot of a file digitally signed by SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA:

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 SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA 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 view the address for SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA, such as the street name, city and country.
DigiCert SHA2 Assured ID Code Signing CA has issued the SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/69 | livewallpaperwindowsservice.exe |
The detection percentage is based on the fact that I've gathered 69 scan reports for the SIDIA INSTITUTO DE CIENCIA E TECNOLOGIA files. 0 of these scan results came up with some sort of detection. You can view the full details of the scan reports by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: