Printer Authenticity Checksum Verification Mechanism
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Solution Overview
Problem
Existing print control systems fail to prevent invalid printing when a printer is replaced with an invalid or compromised device, either by an unauthorized person or one with a fraudulent program, as they do not effectively verify the authenticity of the printer in real-time during single-page transmissions.
Innovation Solution
A print control apparatus that transmits generation condition data, including a checksum value, to the printer to verify its authenticity by comparing it against a locally generated checksum value, using a hash function based on the printer's identification information, thereby confirming the printer's legitimacy before allowing print jobs to be processed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printer ID is checked in each single-page transmission to confirm printer authenticity, then the reliability of printer verification is improved, but the productivity of print data transmission deteriorates due to repeated verification overhead
Solution Approach 1:
The patent performs printer authenticity verification in advance before actual print data transmission. The print control apparatus sends a verification request containing the printer ID to the printer, receives a response, and confirms authenticity before transmitting the actual print job. This preliminary verification action separates the authentication overhead from the data transmission process, improving overall productivity while maintaining reliability.
2Ease of operation
If the printer is replaced with an invalid printer or one with fraudulent programs, then the ease of operation for unauthorized access is improved, but the reliability of the print control system deteriorates due to undetected fraudulent printers
Solution Approach 1:
The patent implements a feedback mechanism where the print control apparatus sends a verification request to the printer and receives a response containing the printer ID. The control apparatus compares the received printer ID with the expected printer ID to determine authenticity. This feedback loop continuously monitors printer identity, enabling detection of fraudulent printer replacements and maintaining system security.
Data Source
AI summary
A print control apparatus includes a processor. The processor is configured to transmit generation condition data to a printer. The generation condition data includes a generation condition for a checksum value. The generation condition is based on identification information of the printer. The processor is also configured to check a first checksum value against a second checksum value to confirm the authenticity of the printer. The first checksum value is generated by the printer according to the generation condition. The second checksum value is generated according to the generation condition on the basis of the identification information of the printer.