I have always thought that Winrar, 7z and other major archivers should have a different icon so then easy to tell by looking at the archive icon which is passworded and which ones are not passworded. Else need to view each archive info or open the archive to know.
Example: A folder has 10 compressed archives only one is passworded. Can you tell which is passworded looking at the icons ?
It is a very good suggestion but not one for AltBinz only. maybe then easier to have the archive developers add an icon that is better for all archives.