A method, system, and apparatus for authenticating transactions and records is disclosed. A nonce stamp is a physical article that is relatively difficult to copy illicitly, and that bears a “nonce” number. The “nonce” is a relatively unique identifier, in that it is chosen from a distribution...http://www.google.fr/patents/US7117363?utm_source=gb-gplus-shareBrevet US7117363 - System and method using information-based indicia for securing and authenticating transactions
System and method using information-based indicia for securing and ...
