Is there any third-party (free) software that my addressee can use to decrypt PGP ZIP, encrypted with passphrase?
I'm on Mac, so I can't use SDA.
I know you can do it with PGP Commandline, but I don't believe there are options to create SDA's, which are the only PGP option I can think of, available in the Mac installation
GPG is the one that comes to mind, but it requires command line usage and/or a third party GUI. And some computer skills that not everyone has.