Portable FreeArc compressor of files with a slight change in them. Changes create protection against opening or viewing the contents of the archive by other instances of the FreeArc archives.
To create your own sample executable files, extract the contents of the archives into a folder THAT CONTAINS NO SPACES IN THE PATH. Run compile.exe with admin rights, enter absolutely any set of characters and wait until the compilation process is complete. At the end, the console will say: "Press ENTER to exit..." and 4 files will appear in the folder next to compile.exe: FreeArc.exe, Arc.exe, unarc.exe, unarc.dll. Archives created by these instances will be available only to themselves. Although such archives without a password will not be opened by other instances, I still advise you to use a password for the archive, which will greatly complicate the task for an attacker who wants to see the contents for any purpose.
Well, FA_protect_v2... in a nutshell, it's just better than the first one.