Printer Fingerprint Authentication for Printed Products
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Solution Overview
Problem
Current antiforgery methods for printed products require modifications to the printing process or distribution, and are limited by the need for specific technologies and data storage for verification, making them impractical for large-scale or widespread authentication.
Innovation Solution
A method that associates a unique identification linked to the 'fingerprint' of the printer, extracted from its typical characteristics, which is embedded in the printed product through synthesis images and identifier codes, allowing for authentication using generic optical-reading devices without modifying the printing process or requiring costly technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical and electronic technologies, RFID, holographic techniques, and chemical or mechanical marking are used for antiforgery marking, then authentication capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses a digital copy of the printer's fingerprint characteristics embedded in the printed output as an authentication marker. Instead of requiring complex physical authentication technologies, the system creates a digital replica of the printer's unique characteristics that can be verified through standard image analysis, thereby simplifying the authentication mechanism while maintaining reliability
Solution Approach 2:
The patent replaces complex mechanical and electronic authentication systems (RFID, holographic techniques, chemical marking) with a digital information-based approach. By substituting physical authentication mechanisms with digital fingerprint analysis of printed images, the system achieves authentication capability without requiring complex devices or special materials
2Reliability
If pre-set hidden information is embedded in the printed product for verification, then authentication capability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The system enables the printed product to authenticate itself by containing intrinsic characteristics of the printer that produced it. The printer's natural variations and characteristics are captured and embedded in the output without requiring additional precision embedding steps, allowing the product to self-verify its authenticity through standard image analysis
Solution Approach 2:
The patent changes the approach from embedding precise hidden information to capturing and analyzing the natural parameter variations of the printing process itself. By focusing on the inherent characteristics of the printer (such as slight variations in dot placement, color intensity, or line thickness) rather than attempting to embed precise authentication data, the system reduces manufacturing precision requirements while maintaining authentication capability
3Measurement precision
If individual characterization and data storage is performed for each printed item, then authentication accuracy is improved, but productivity decreases
Solution Approach 1:
The patent creates a universal authentication system where a single set of printer fingerprint characteristics can verify multiple printed items produced by that printer. Instead of requiring individual characterization of each printed item, the system extracts the printer's inherent characteristics once and uses them to authenticate all outputs from that printer, thereby improving both authentication accuracy and productivity
Solution Approach 2:
The system performs preliminary extraction and storage of the printer's fingerprint characteristics before mass production of authenticated items. By capturing the printer's characteristics in advance and storing them for reference, the system enables rapid authentication of subsequent printed items without requiring time-consuming individual analysis, thus improving productivity while maintaining authentication accuracy
4Measurement precision
If specific image-acquisition devices or predetermined verification tools are required, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
Instead of requiring specialized verification devices to detect authentication markers, the patent inverts the approach by making the authentication markers (printer fingerprint characteristics) detectable through standard image analysis. The system is designed so that common optical reading devices can capture and analyze the embedded characteristics without requiring specialized equipment, thereby improving ease of operation while maintaining verification precision
Solution Approach 2:
The patent creates a digital copy of the printer's characteristics that can be analyzed through standard image processing algorithms. By representing the authentication information in a format compatible with generic optical reading devices and standard software, the system eliminates the need for specialized verification tools while maintaining sufficient precision for authentication
Data Source
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AI summary
Method for antiforgery marking and authentication of printed products, comprising the following steps; printing sample prints with a given printer of an image that is to be associated to a product (P); digitally acquiring the prints, to obtain digital images; processing the images acquired for extracting therefrom one or more intrinsic characteristics identifying the printer used; and incorporating in the printed product (P) an identification marking containing information associated to the printed product and to the characteristics identifying the printer and a print of said image.