Did you just stumble upon a download or a file on your computer that is digitally signed by Dreamsecurity Co., Ltd.? If that's the case, please read on.
You will probably notice Dreamsecurity Co., Ltd. when 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 Dreamsecurity Co., Ltd. certificate with the following steps:
Here is a screengrab of a file digitally signed by Dreamsecurity Co., Ltd.:

As you can see in the screencap above, the Windows OS states that "This digital signature is OK". This implies that the file has been published by Dreamsecurity Co., Ltd. and that the file has not been tampered with.
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 view the address for Dreamsecurity Co., Ltd., such as the street name, city and country.
thawte SHA256 Code Signing CA has issued the Dreamsecurity Co., Ltd. certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screengrab above.
These are the Dreamsecurity Co., Ltd. files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Dreamsecurity Co., Ltd. files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Dreamsecurity Co., Ltd..
| Detection Ratio | File Name |
|---|---|
| Not available | NTSMagicLineNP.exe |
The analysis is based on certificates with the following serial numbers: