>> Your security must work even when Moriarty has the schematic. Yes, and no. Just because smart crooks could still break into your system does not mean that doing simpler things to discourage the dumb crooks isn't a good idea... BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist