INFORMATION PRINTED MATTER, METHOD FOR READING, AND AUTHENTICATION METHOD

摘要

PROBLEM TO BE SOLVED: To prevent unauthorized authentication by an illegal copy such as a camera, copier and the like, and illegal acquisition of personal information while maintaining information transmission/reception easiness of a two-dimensional code.SOLUTION: In an information printed matter, additional information consisting of a hard ink layer is formed as a latent image in a part of a printing region on which a first code information is formed, the additional information is visualized by scratching it by use of a metal matter, and the first code information is combined with the additional information to form a second code information.SELECTED DRAWING: Figure 1