A method and system as presented by which valuable documents such as checks, deeds, driver's licenses, and other types of valuable documents can be imprinted with encoded symbols by a printer whereupon multiple assemblages of data can be imprinted on the valued document which is then susceptible to readout...http://www.google.de/patents/US6212504?utm_source=gb-gplus-sharePatent US6212504 - Self-authentication of value documents using encoded indices
