Loyalty cards for users of museums and leisure sites, uses code on card to point to address in computer memory where user's fingerprint is stored, and uses fingerprint to authenticate user at each visit

摘要

The loyalty card (1) is issued (6) on the first visit, and contains only a pointer to a computer address. The visitor has their fingerprint recorded by a sensor (2), and the digitized fingerprint is stored (4) on the computer at the address (5) pointed to by the address on the card. On subsequent visits the user presents the card and their fingerprint is compared with the stored fingerprint.