TWO DIMENSIONAL BARCODE AND METHOD OF AUTHENTICATION OF SUCH BARCODE

摘要

A method is disclosed for creating a 2D barcode. In an embodiment, the method includes: embedding primary information that can be read by a 2D-barcode-reader in a primary information pattern, and embedding secondary information that is made difficult to reproduce without alteration in a visible pattern. In an embodiment, the visible pattern is embedded within the barcode in at least one area that does not contain any primary information

主权项

1. A method for creating a 2D barcode, comprising:
embedding primary information, readable by a 2D-barcode-reader, in a primary information pattern; embedding secondary information in a visible pattern in at least one area that does not contain any of the primary information such that the secondary information is separated from the primary information, to thereby create the 2D barcode including the primary information pattern with the embedded primary information and the visible pattern with the embedded secondary information, wherein said secondary information embedded in the visible pattern is formed by light and dark elementary sub-cells smaller than 50 μm and is configured to be difficult to reproduce without alteration, and wherein the secondary information is embedded in the visible pattern using a secret key such that the visible pattern including the embedded secondary information contains a secret.