Limitations of other modules from reliability/security view:

=over

=item GPG

 - Doesn't handle SIGCHLD, SIGINT, SIGQUIT.
 - Hang on large files.
 - Parse unreliable STDOUT instead of reliable --status-fd.

=item Crypt::GPG

 - Doesn't handle SIGINT, SIGQUIT.
 - Incorrectly handle SIGCHLD.

=item GnuPG

 - Doesn't handle SIGCHLD, SIGINT, SIGQUIT.
 - Use deprecated shared memory interface.
 - Use temporary files to store sensitive information.

=item GnuPG::Interface

 - Doesn't handle SIGCHLD, SIGINT, SIGQUIT.

=back