Anti-counterfeit Authentication System of Printed Information Based on A Logic Signing Tehinique

To protect printed information from being forged, tampered with or misappropriated, a logic signing technique was developed, which was applied to anti-counterfeit authentication system so as to intelligently make printed information verified quickly, conveniently, precisely and feasibly. The technique is independent of what physical equipment used, the system based on the technique is characteristically open and secure cryptographically due to the logical association between synthetic information and encrypted verification information, which essentially changes the mode of the existing anti-counterfeit techniques for printed information. PMI is bestowed to resolve the issue of management of crpto-keys as a convincing complementarity for the authentication system based on the logic signing technique.