whatever you like after reading this
https://docs.google.com/viewer?a=v&q=cache:-N798TI0M10J:www.hidglobal.com/documents/understandCardDataFormats_wp_en.pdf+&hl=en&gl=nl&pid=bl&srcid=ADGEESgtO8OCgUEtQxXsRKtS_i4buUE03Z4dIe_vSU92YgvNl_KmOvTut-Fjx9fqisEWCvZfQbuZ-ogbXJYCB885HiQ9moQC0kCInJ0Cq8E23q_Eh_0lnZc0cDnNe6WIDtXi9jD27DUu&sig=AHIEtbROMxgfNk-YFfQdnzbp4FYgqhEQmQ&pli=1