In a system for reading data encoded on a single, secure, personal, portable database of private information, such as an optical memory card, a method of interaction between an optical card user, a broker and an agency seeking a transaction with the card user. The user is provided with a blank optical...http://www.google.se/patents/US7131574?utm_source=gb-gplus-sharePatent US7131574 - Optical memory card based e-commerce business method
