Document Security via Unpredictable Point Distribution
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Solution Overview
Problem
Current methods for securing documents, particularly in static printing, fail to effectively prevent counterfeiting and accurately identify copies due to limitations in printing quality and the inability to vary the brand and message with each print, leading to challenges in authenticating unique impressions and tracing printing plates.
Innovation Solution
A method that generates a distribution of points with unpredictable variations, simulating printing defects, making it difficult for counterfeiters to correct the variations and distinguish original and copied documents, while also incorporating a unique signature based on printing hazards to identify each document.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If static printing is used to maintain consistent branding across documents, then manufacturing precision is improved, but the ability to uniquely identify and authenticate individual documents deteriorates
Solution Approach 1:
The patent applies preliminary action by generating a unique identifier for each printing plate before the actual printing process. This identifier is embedded in the digital file that creates the printing plate, ensuring that each plate can be traced back to its authorization. The system pre-generates cryptographic signatures and stores them in a database before printing occurs, enabling subsequent authentication without interfering with the printing consistency.
Solution Approach 2:
The patent introduces an intermediary authentication system that mediates between the static printing process and document verification. A centralized database stores cryptographic signatures of authorized printing plates, acting as an intermediary layer. When authentication is needed, the system compares the identifier extracted from the printed document against this database, enabling reliable verification without altering the original printing process.
2Reliability
If serialized printing is used to provide unique identification for each document, then document authentication is improved, but manufacturing precision and print quality deteriorate
Solution Approach 1:
The patent extracts the authentication function from the main printing process. Instead of embedding authentication data directly in the printed document (which would affect print quality), the system separates authentication into two parts: a compact identifier embedded in the printing plate metadata, and a cryptographic verification process that occurs outside the printing workflow. This extraction allows high-quality printing while maintaining authentication capabilities.
Solution Approach 2:
The patent uses cryptographic copying mechanisms where the original authentication signature is stored in a secure database, and verified copies are generated during authentication. The system creates cryptographic hashes and digital signatures that can be replicated and verified without affecting the physical print quality. Each printing plate receives a unique cryptographic identifier that can be copied and verified indefinitely without degrading the original.
3Productivity
If printing plates are reused for multiple print runs to maintain manufacturing efficiency, then productivity is improved, but the risk of counterfeiting increases
Solution Approach 1:
The patent implements feedback mechanisms where each printing plate's identifier is registered in a centralized database before use. The system continuously monitors and tracks the usage of each plate through cryptographic verification. When a document is printed, its authentication status is verified against the database, providing real-time feedback on plate legitimacy. This feedback loop enables the system to detect and prevent counterfeiting while maintaining plate reuse for legitimate production.
Solution Approach 2:
The patent applies preliminary action by pre-registering each printing plate's cryptographic identifier in a secure database before the plate is used for any printing. This preliminary registration creates an authorization record that enables subsequent verification. The system also pre-generates cryptographic signatures for each plate, ensuring that before any printing occurs, the plate's legitimacy is established and stored for future verification, thereby preventing counterfeiting while allowing efficient reuse.
Data Source
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AI summary
The invention relates to a method for securing documents that comprises the step of printing a distribution of points on said document, said printing inducing due to printing randomness a point-by-point unpredictable variation of at least one geometrical variation of the printed points and, before said printing step, the step of generating said point distribution so that the points of said distribution have at least one variable geometrical characteristic between them, the geometrical amplitude of the variation generated having the same magnitude as said unpredictable variation. In some embodiments, during the generation step and in said point distribution, at least one half of the points of said distribution are not laterally juxtaposed to four other points of said point distribution, and at least one dimension of at least a portion of the points of said point distribution has the same magnitude as the average of the absolute value of said unpredictable variation.