Methods for generating and verifying two-dimension code of invoice

Abstract

The invention discloses methods for generating and verifying a two-dimension code of an invoice. The method for generating the two-dimension code of the invoice comprises the following steps of: calculating a maximum data size which can be stored by the two-dimension code of the invoice; extracting the key information of the invoice according to the maximum data size, and generating an identity code of the invoice; encrypting the identity code of the invoice to generate a cryptograph of the two-dimension code; generating the two-dimension code of the invoice according to the cryptograph of the two-dimension code. The method for verifying the two-dimension code of the invoice comprises the following steps of: scanning the two-dimension code of the invoice; extracting the cryptograph of the two-dimension code; decrypting the cryptograph of the two-dimension code, and acquiring the identity code of the invoice; decoding the identity code of the invoice, and acquiring the key information of the invoice; checking the key information of the invoice with information on a paper invoice one piece by one piece, wherein the condition that the invoice is an authentic invoice is proved if all pieces of information are consistent. The two-dimension code, generated by using the method for generating the two-dimension code of the invoice, of the invoice has an anti-counterfeiting function, the authenticity of the invoice is guaranteed, the methods for generating and verifying the two-dimension code of the invoice are applicable to an occasion with secrecy and anti-counterfeiting requirements, a means of verifying the authenticity of the invoice in an off-line manner is provided simultaneously, and the counterfeiting phenomenon of the invoice can be effectively fought.

Description

technical field [0001] The invention relates to the field of bill anti-counterfeiting, in particular to a method for generating and verifying a two-dimensional code of an invoice. Background technique [0002] At present, the promotion of online invoices across the country is in full swing. In order to realize the anti-counterfeiting and inspection of online invoices, it is necessary to print the invoice QR code on the paper invoice, and the taxpayer can scan the QR code to check the authenticity of the invoice. [0003] The two-dimensional code has the following characteristics: (1) high-density coding, large information capacity, about dozens of times higher than ordinary barcode information; (2) wide coding range, two-dimensional code can include pictures, sounds, text (including multiple languages), signatures, fingerprints, etc.; (3) strong error tolerance and error correction function, when the two-dimensional code is partially damaged due to perforation, defacement, e...

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, the information contained in the two-dimensional code has not been encrypted, and the counterfeiter can read the information contained in the two-dimensional code as long as he has a corresponding two-dimensional code reading device, so that according to the information contained in the two-dimensional code In this way, the two-dimensional code is difficult to apply in some occasions with confidentiality requirements and anti-counterfeiting requirements

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