in reply to
I pointed out the other day the ability to release encrypted Perl source using a decrypting Perl source filter ('perldoc perlfilter' on your local system). The fact that it still really is source (just encrypted) and is still run through normal Perl compilation/execution paths means it still can be intercepted as some other monk(s) so astutely pointed out. But it's not a bad start. It at least prevents casual source viewing. You'd have to work some to get back to the real source state.