Encrypt files and directories in an archive using GPG.

# To encrypt a directory into archive.gpg using a passphrase:
gpg-zip --symmetric --output <archive.gpg> <path/to/directory>

# To decrypt archive.gpg into a directory of the same name:
gpg-zip --decrypt <path/to/archive.gpg>

# To list the contents of the encrypted archive.gpg:
gpg-zip --list-archive <path/to/archive.gpg>