Process and device for securing data mixed into an image

Abstract From the Canadian patent

Redundancy is added to the data (D h, v) mixed-, in in the form of alphanumeric symbols in that the data, is combined with a defined algorithm and a test information item in the form of an alphanumerically displayable test symbol (P) is obtained therefrom. This test symbol is likewise mixed into the image (DF). Upon processing of the mixed-in data (D, h, v) using the same algorithm a, test symbol is likewise obtained, the agreement of which with the mixed-in test symbol (P) demonstrates the correctness of the mixed-in data. Use for data security in systems for automatic speed monitoring, especially in photographing radar speed measuring systems. (Fig. 1)