Steganography method and verification method for anti-counterfeiting information based on electronic official seal text content

Abstract

The invention discloses a steganography method for anti-counterfeiting information based on electronic official seal text content, the steganography method comprises the following steps of: signing anti-counterfeiting information to obtain a signature of the anti-counterfeiting information; generating a secret key according to the text content in the electronic official seal, and encrypting the signature by using the secret key to obtain a ciphertext of the anti-counterfeiting information; extracting pixel points of the characters of the electronic official seal to obtain a pixel point coordinate list of the characters of the electronic official seal; generating a steganography pixel point coordinate list of characters of the electronic official seal; and writing the ciphertext of the anti-counterfeiting information into each pixel point in the steganography pixel point coordinate list to realize steganography of the anti-counterfeiting information of the electronic official seal. According to the method, steganography, extraction and verification of the anti-counterfeiting information in the electronic official seal can be achieved, whether the electronic official seal is a falseseal or not can be effectively detected, traceless embedding of the anti-counterfeiting information can be achieved, the method has better invisibility, the appearance of the official seal is not affected, and the algorithm is not prone to cracking and high in safety.

Description

technical field [0001] The invention relates to the technical field of anti-counterfeiting of electronic official seals, in particular to a steganographic method and a verification method of anti-counterfeiting information based on the text content of electronic official seals. Background technique [0002] The electronic official seal simulates the traditional physical official seal with advanced digital technology. The management and use of the electronic official seal conform to the habits and experience of the physical official seal. The electronic documents affixed with the electronic official seal have the same appearance and the same effective Sex and similar usage. [0003] The existing electronic official seal anti-counterfeiting technology is not mature enough. For example, use the image and text features of the official seal to encrypt anti-counterfeiting, and realize the anti-counterfeiting of the electronic official seal by changing the text ratio of the electr...

AI Technical Summary

Problems solved by technology

[0003] The existing electronic official seal anti-counterfeiting technology is not mature enough

For example, use the image and text features of the official seal to encrypt anti-counterfeiting, and realize the anti-counterfeiting of the electronic official seal by changing the text ratio of the electronic official seal, measuring the characteristic distance between characters, changing the inclination angle and position of the text, etc., this method is used in high-precision instruments It is easy to forge the electronic official seal, and the change is relatively large within the visible range

As another example, if the electronic official seal has grating anti-counterfeiting code and anti-counterfeiting crack, you can use a specific grating sheet to check the grating anti-counterfeiting code in the official seal, and you can also judge whether the document has been replaced by comparing the anti-counterfeiting crack in the electronic official seal. Although this grating anti-counterfeiting The code is invisible to the naked eye, but the anti-counterfeiting crack has a great impact on the appearance of the official seal, and the security of the grating anti-counterfeiting code is not enough, the grating sheet is easy to be leaked and cracked, and the unified management, distribution, and update of the grating sheet require a lot of labor costs

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