Patent ID: 6039249
Filing Date: 2000-03-21
Classification: G06Q,G07D,G07F

Abstract:
A method for identifying whether a specific document is genuine, comprising the steps of:permanently embedding in each said document at the time of creation a device readable, multiple digit first number;permanently also embedding in said specific document at the time of its creation a device readable, multiple digit unique second number derived from a predetermined sequence of numbers;at least one of said first and second numbers being a random number;storing in a secure database for each issued document said first and second embedded numbers as being related to a specific document;at the time of initial presentation of said specific document reading said first and second embedded unique numbers both embedded on said document and storing said numbers to said database;determining from said database whether said embedded numbers read from said document are uniquely paired with each other;creating a validity signal only when such pairing is found to exist and instead transmitting an invalidity signal only when such pairing is found not to exist.