Why are the Imaging assemblies not digitally signed?
If you open the properties of the Aspose.Imaging.DLL there is no Digital Signature tab.
You may be thinking of signing for a strong named assembly.
They are not the same thing.
Take a look at Aspose.Cells.DLL and you will see the tab.
Could they be missing from the DLLs Only zip?
Attached is my screen shot.
The issues you have found earlier (filed as ) have been fixed in this Aspose.Words for JasperReports 18.3 update.