Safety three-dimensional code for block chain and generation and decoding method

Abstract

The invention discloses a safety three-dimensional code for a block chain and a generation and decoding method. The safety three-dimensional code comprises a code word positioning area, a code word starting point confirmation area, a code word control information area, a code word data information area and a picture area. Pictures, two-dimensional code and / or three-dimensional code words and setsare embedded into the picture area. The generation method comprises the following steps: acquiring data information to be transmitted and a picture, a two-dimensional code and / or a two-dimensional code word to be embedded; extracting picture characteristic value information and storing in a server, and forming data information to be transmitted through encryption, compression and error coding processing; and determining the composition and size of the security three-dimensional code, and filling the security three-dimensional code with the content of each region to generate a corresponding security three-dimensional code. The decoding method comprises the steps of scanning and photographing the safety three-dimensional code, obtaining a picture, processing and restoring the picture, performing error control decoding and decompression on restored information, and reading and decrypting data information through the code scanning terminal. According to the invention, the anti-counterfeiting performance is effectively improved, and the visual identification of the embedded picture is improved.

Description

Technical field[0001]The present invention relates to the technical field of information security combining the Internet of Things and blockchain, in particular to a secure three-dimensional code used in the blockchain and a method for generating and decoding.Background technique[0002]Three-dimensional code is based on two-dimensional code, superimposed with color codewords. Its biggest feature is that color is a new dimension of information, which increases the information capacity and can add more information in the same unit area. , Which can add more secure encrypted information, improve security, and further use information compression algorithms to increase information capacity.[0003]The three-dimensional code has larger information capacity, the same ease of identification and better security. Whether it is a one-dimensional bar code or a two-dimensional code, it is a two-dimensional space code printed on a plane, on the same coding area , 3D code can contain a large amount o...

AI Technical Summary

Problems solved by technology

However, there is no correlation between the pictures provided by these two methods and the two-dimensional code, and there is no fundamental solution to the security problem of the two-dimensional code.

This method of embedding pictures in patent document CN101063999A utilizes the error correction capability of two-dimensional codes. Generally, the error correction capability of error correction codes is about 30%, so the area of ​​logos or pictures embedded in two-dimensional codes can only occupy the entire two-dimensional code. About 10% of the QR code area, if the area is too large, it will not be possible to correct and identify the QR code

And such a small area makes it difficult to identify the logo or picture with the naked eye

At the same time, there is no necessary connection between the logo, the picture and the QR code. Even if the picture is changed, consumers will not be able to recognize it

[0012] At the same time, due to the openness of the QR code, the two-dimensional code can be faked arbitrarily in anti-counterfeiting applications. The QR code only records the URL of the anti-counterfeiting certification, and anyone can set the authentication URL. Therefore, the security and confidentiality of the existing two-dimensional code There are still some defects

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