I've read the following FAQ from www.perl.com website , but I can fgure out how tom implement all these things. "You can try using encryption via source filters (Filter::* from CPAN), but crackers might be able to decrypt it. " Does anyone know how to encrypt a perl source file and then use filters to decode and execute it ? Thanks in advance Ken _______________________________________________ ActivePerl mailing list [EMAIL PROTECTED] http://listserv.ActiveState.com/mailman/listinfo/activeperl