Information security technology combining visual cryptography and photochromic material

Abstract

The invention relates to an information security technology combining visual cryptography and a photochromic material. The technology is characterized in that the technology is based on the visual cryptography principle, one of information subgraphs generated by a visual cryptography scheme is printed into a certain substrate carrier through the photochromic material which has certain selectivityto laser parameters, another generated information subgraph is printed onto a transparent and visible carrier material, the transparent carrier material is calibrated and aligned with the substrate carrier, laser beams of specific parameters are used for illuminating, and finally original information can be decrypted and seen by human eyes. The technology has the advantages that the photochromic material is used for printing the image information of the visual cryptography, the safety and practicality of optical information are increased, and the technology is applicable to fields such as illegal copying preventing, copyright protection, information encryption and hiding and identity authentication.

Description

technical field [0001] The invention relates to an optical information security technology, in particular to an image information security technology based on the combination of a visual cryptography scheme and a photochromic material, and the combination of the photochromic material based on the visual cryptography scheme improves the security and practicability of optical information . Background technique [0002] Visual cryptography (visual cryptograph) technology is based on the ability of the human visual system to identify correlations and the encryption method of random grids for images. Visual cryptography is an image-mediated information encryption technology. According to the algorithm rules, the image carrying information is encoded into several pseudo-random sub-images with hidden information. As long as a specific number of sub-images are accurately aligned and superimposed, the original image can be decrypted with the human eye without relying on any cryptogra...

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Problems solved by technology

See (Nature, 2002, 420 (6917): 759-760; Chem Commun, 2005, 3895-3905; J Am Chem Soc, 2005, 127 (25): 8922-8923.) The existing field of optical information security involves Most of them are encryption, hiding, authentication, and watermarking of image information, but it is difficult to balance security and practicability at the same time, and the security is too simple to rely on the design of an improved algorithm to improve the system. At the same time, most The optical security system has been in the stage of numerical simulation and cannot be applied to real life scenarios

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