Certificate Sheet Security via Encoded Micropatterns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses face challenges in securely managing private keys without the need for expensive IC card readers, as printed certificate sheets with private keys can be easily copied and used unauthorizedly.
Innovation Solution
An image forming apparatus that includes a print unit for printing a certificate sheet with an encoded image containing a micropattern and private key information, and a micropattern reading unit to verify the authenticity of the certificate sheet by comparing the encoded micropattern with the actual micropattern, inhibiting unauthorized use by distinguishing original from copied sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a private key is printed on a certificate sheet without additional security features, then the system requires no additional hardware (cost-effective), but the certificate sheet can be easily copied and used unauthorizedly
Solution Approach 1:
The patent applies parameter changes by transforming the visual appearance of the certificate sheet through encoded images that alter the micropattern structure. The encoded image modifies the optical parameters of the sheet surface, creating a unique micropattern that is difficult to replicate. This allows the certificate sheet to maintain its basic printed form while incorporating security features that change the physical parameters at a microscopic level.
Solution Approach 2:
The patent transitions from two-dimensional printed information to three-dimensional micropattern structures by encoding data into the physical structure of the sheet. The encoded image creates variations in the sheet's surface topology, adding a dimensional aspect that goes beyond conventional printing. This dimensional transformation makes copying difficult while maintaining compatibility with standard printing processes.
2Reliability
If an IC card reader is provided to securely manage private keys, then unauthorized use is prevented, but the system requires considerable additional expense
Solution Approach 1:
The patent uses the principle of copying by creating a visual representation (encoded image) of the private key information on the certificate sheet. Instead of requiring physical IC cards and readers, the system creates a copyable visual encoding that can be read by standard imaging devices. The encoded image serves as a substitute for the IC card interface, allowing private key management through conventional printing and scanning infrastructure.
Solution Approach 2:
The patent replaces the mechanical IC card reader system with an optical reading system. Instead of requiring physical contact between an IC card and a reader device, the system uses optical scanning to capture the encoded image on the certificate sheet. This substitution eliminates the need for specialized mechanical reading hardware while maintaining security through optical pattern recognition.
3Ease of manufacture
If conventional printing is used to produce certificate sheets, then the process is simple and cost-effective, but the printed sheets lack protection against unauthorized copying
Solution Approach 1:
The patent applies preliminary action by embedding the security feature (encoded image with micropattern) into the certificate sheet during the initial printing process. Rather than adding security features after printing, the security encoding is incorporated beforehand into the print data itself. This preliminary incorporation ensures that the security features are an integral part of the printing process, making them difficult to separate or replicate independently.
Data Source
AI summary
An image forming apparatus has a micropattern reading unit, an encoded image generating unit and a code printing control unit. The micropattern reading unit reads a micropattern of a sheet. The encoded image generating unit generates an encoded image. The encoded image has the micropattern and a private key of a user. The code printing control unit prints the encoded image on the sheet to produce a certificate sheet.