If the system area of the memory includes the...http://www.google.com/patents/US5719387?utm_source=gb-gplus-sharePatent US5719387 - IC card including a memory, a password collating means and an access permitting means for permitting access to the memoryAdvanced Patent SearchPublication numberUS5719387 APublication typeGrantApplication numberUS 08/502,729Publication dateFeb 17, 1998Filing dateJul 1