37results about How to "Improve anti-counterfeiting security" patented technology

A two-dimensional bar code-based anti-counterfeiting method, a label, and a method for manufacturing the label. A two-dimensional bar code (11) and a graphic (12) are integrated for anti-counterfeiting; this prevents the problem of cracking by an unscrupulous person using brute-force attack via a digital code. A second printing carrier is used to obscure the graphic (12); this prevents the problem of the graphic (12) being directly visible to and scanned by the unscrupulous person. The presence or absence of a demarcation line between the first printing carrier and the second printing carrier allows for the distinction of a computer-generated two-dimensional bar code image from a two-dimensional image read by an image-reading device; this prevents the problem of a two-dimensional bar code database being cracked by the unscrupulous person via brute-force attack. Because the second printing carrier is affixed randomly onto the first printing carrier, and information of relative positions of the demarcation line between the first printing carrier and the second printing carrier and of the two-dimensional image is stored in data, consistency of the position of the demarcation line can be analyzed and determined; this prevents the unscrupulous person from manufacturing a counterfeit label by imitating the manufacturing process of the label.

The invention relates to a method and a tag based on two-dimension code anti-counterfeiting and a tag manufacturing method. The problem that law breakers decode through method of exhaustion by numeric code is avoided by combining with a two-dimension code and images and characters to anti-counterfeiting; the problem that the law beakers can directly see and scan images and characters is avoided by applying a second printing carrier to cover the images and characters; the two dimension code images which are produced by computers and the two dimension images which are read by an image reading device can be differentiated through the existence of the border of a first printing carrier and the second printing carrier, so that the problem that the law breakers decode the two dimension data base through the method of exhaustion is avoided; due to the fact that the second printing carrier is randomly attached on the first printing carrier, and the border between the first printing carrier and the second printing carrier and relative position information of the two dimension images are stored in data, and whether the position of the border is consistent or not can be analyzed and judged, so that the problem that the lawbreakers manufacture counterfeit tags by simulating manufacturing process of the tags can be prevented.

The invention discloses a design method for realizing multiplexing of a single-color random anti-counterfeiting pattern and a double-color anti-counterfeiting pattern based on a metasurface, in whicha random anti-counterfeiting pattern can be generated by rotating the metasurface under the condition that single-wavelength linear polarized light is incident. Under the condition that double-wavelength polarized light is incident, a double-color anti-counterfeiting pattern can be generated through a rotary polarization analyzer, and finally multiplexing of the single-color random anti-counterfeiting pattern and the double-color anti-counterfeiting pattern is achieved. The design method is ingenious, random selection of the anti-counterfeiting pattern and dual-wavelength implementation of thedouble-color anti-counterfeiting pattern improve the counterfeiting difficulty, so that the double-color anti-counterfeiting pattern is difficult to copy and imitate, and the anti-counterfeiting security is greatly improved. The metasurface structure is simple and compact, the size is small, the weight is light, the metasurface structure can be conveniently integrated to high-end chips, watches,diamond rings and other valuable commodities with the small size, and an anti-counterfeit label based on the design method is not prone to being perceived, obtained and counterfeited.

The invention discloses an aluminum foil paper color-changing anti-counterfeit composite device and a process. The anti-counterfeit composite device includes an aluminum foil paper body, and the aluminum foil paper body is composed of an aluminum foil backing paper, an aluminum foil base material and a reflective strip anti-counterfeiting label. The aluminum foil backing paper is set on The bottom of the aluminum foil base material, and both sides of the aluminum foil backing paper and the middle of the aluminum foil base material are provided with parallel anti-counterfeiting anti-counterfeiting labels, and both sides of the top of the aluminum foil base material are provided with evenly distributed strip-shaped holes. In the present invention, the aluminum foil paper body is formed by pressing the aluminum foil backing paper, the aluminum foil base material and the anti-counterfeiting label of the reflective strip, and the degree of integration is high. The anti-counterfeiting ink layer further improves the anti-counterfeiting ability of the aluminum foil paper, which is convenient for identifying the authenticity of the aluminum foil paper. The aluminum foil paper body is produced by the anti-counterfeiting composite device, which has high production efficiency, high degree of standardization, and reduces production costs.