Cryptographic Trademark Verification With Offline Image Hash Matching
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Solution Overview
Problem
Current trademark anti-counterfeiting methods, such as laser anti-counterfeiting and watermarking, are costly and have poor effectiveness due to issues like pixel color deviations and the need for high-precision devices and real-time database verification, leading to increased costs and verification difficulties.
Innovation Solution
A cryptography-based method that uses an ordinary printing device to print trademark images, measures feature point pixels, performs fusion calculations, and generates a hash or signature-based anti-counterfeiting code, enabling offline verification with low-cost devices and improved security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laser anti-counterfeiting technology or anti-counterfeiting watermarking technology is used, then anti-counterfeiting performance is improved, but anti-counterfeiting cost increases
Solution Approach 1:
The patent replaces expensive laser anti-counterfeiting technology and watermarking technology with ordinary printing devices to print trademarks. Instead of using costly specialized equipment, the invention uses disposable, low-cost printing methods combined with cryptographic algorithms to generate anti-counterfeiting codes, thereby significantly reducing anti-counterfeiting costs while maintaining effective anti-counterfeiting performance.
Solution Approach 2:
The patent substitutes physical anti-counterfeiting mechanisms (laser technology, watermarking) with cryptographic mathematical methods. By using hash functions and digital signatures on trademark images, the system replaces expensive mechanical/optical anti-counterfeiting systems with software-based cryptographic verification, achieving cost reduction without sacrificing security.
2Measurement precision
If real-time database verification is used, then verification accuracy is improved, but verification cost and time increase
Solution Approach 1:
The patent pre-generates anti-counterfeiting codes during the trademark printing process itself. The cryptographic hash and digital signature are calculated and embedded in the anti-counterfeiting code at the time of printing, so that during verification, the system only needs to read and verify the pre-computed code rather than performing real-time database queries or complex calculations, thus eliminating verification time delays.
Solution Approach 2:
The patent extracts the verification information (hash value and digital signature) from the trademark image and embeds it in a separate anti-counterfeiting code. This allows the verification process to independently check the authenticity by comparing the extracted information with the pre-stored anti-counterfeiting code, without needing real-time database connectivity, thereby reducing verification time and cost.
3Reliability
If unique labels with transparent thin film are used, then label uniqueness is improved, but anti-counterfeiting cost increases and user convenience deteriorates
Solution Approach 1:
The patent replaces expensive transparent thin film materials with ordinary printing materials. The uniqueness of the label is achieved not through special physical materials but through cryptographic algorithms that generate unique anti-counterfeiting codes for each trademark, making the solution both cheaper and more accessible while maintaining label uniqueness and authenticity verification capability.
Solution Approach 2:
The patent substitutes physical material properties (transparent thin film with light transmission characteristics) with cryptographic mathematical properties. Instead of relying on special materials to provide uniqueness, the system uses hash functions and digital signatures to ensure each label's uniqueness, eliminating the need for expensive materials and improving user convenience.
4Reliability
If transparent thin film is used to display trademark image, then label uniqueness is achieved, but user convenience deteriorates due to difficulty in naked eye distinction
Solution Approach 1:
The patent uses visible color information from the trademark image to generate the anti-counterfeiting code. The cryptographic processing is based on the color values of the trademark, and the resulting anti-counterfeiting code can be displayed in visible forms (such as QR codes or colored patterns) that users can easily see and verify with their naked eyes, eliminating the need for special transparent thin film materials and improving user convenience.
Data Source
AI summary
A trademark anti-counterfeiting method based on cryptography is provided, where a trademark owner prints an anti-counterfeiting code associated with a trademark image through a specific method. A verifier executes following verification process: collecting a trademark image by using a photosensitive device; measuring K feature points of collected trademark image to obtain N groups of color values; calculating M_i′ and a hash value MH_i′ of M_i′; using the photosensitive device to read N MH_i values, MH and MH signature values of anti-counterfeiting code, and using a public key to verify validity of MH signature value; if the MH signature value is valid, performing fusion operation on N MH_i values, determining whether result of fusion operation is MH, if so, determining that N MH_i values are valid; comparing MH_i′ with MH_i one by one, and if the comparison is successful, the verification is successful, otherwise the verification fails.