I would like to add a column to DOpus lister to show if a file has been signed with a certificate and/or display the certificate name. I don't think this exists in the pre-defined columns. But would there be a technique (script or else) that would allow this?
The Description column will tell you if things are signed (and a lot of other information, but not who they are signed by).
Script columns might be able to do exactly what you want, if you can find a way to get the information from a script. (Not something I've needed so I'm not sure what the best way is. Running SignTool is one option but maybe there's a proper scripting API for authenticode somewhere.)
Description column inside zipped files does not show the "Signed" info. If possible, it would be convenient to also see this info in these compressed files.
It would require extracting the whole exe/dll file from the archive just to get the signing information, which doesn't really make sense to us for something that happens automatically / on the fly. For file display columns, we usually only report information about files in archives if it can be obtained by only decompressing a small amount at the start of each file.
This already eliminated the "unsafe website" alerts (at least, for now, from Google and Microsoft SmartScreen). I hope it will also reduce/eliminate the malware alerts...