CRUM Chip Integrity Detection for Printer Consumable Communication
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Solution Overview
Problem
Communication errors between consumable units and image forming devices pose safety risks due to noise interruptions and potential hacking, leading to incorrect data transmission and premature or inappropriate recycling of consumable units, which can result in device breakdowns and quality deterioration.
Innovation Solution
The implementation of a Customer Replaceable Unit Monitoring (CRUM) chip with integrity detection data, which accumulates error detection data from previous communications to ensure secure data management and accurate consumable unit monitoring, using encryption algorithms and Message Authentication Codes (MAC) for certification and data exchange between the CRUM chip and the controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If communication is performed between CRUM chip and controller without integrity detection, then communication simplicity is maintained, but data security and reliability deteriorate due to noise interruptions and potential hacking
Solution Approach 1:
The patent applies preliminary action by generating integrity detection data (such as Message Authentication Codes or checksums) before data transmission occurs. This detection data is embedded in the communication packets in advance, allowing the receiving end to verify data integrity without requiring complex real-time monitoring mechanisms during communication.
Solution Approach 2:
The patent introduces integrity detection data as an intermediary element that mediates between the transmitted data and the verification process. This intermediary component (integrity detection data) enables reliable communication by providing a separate verification channel that doesn't complicate the primary data transmission path.
2Reliability
If integrity detection data is accumulated from previous communications, then data security is improved, but communication processing time increases
Solution Approach 1:
The patent merges integrity detection operations with the existing communication protocol by integrating detection data generation, transmission, and verification into the standard communication flow. This combining approach allows security verification to occur concurrently with normal data exchange rather than as a separate time-consuming process.
Solution Approach 2:
The patent ensures continuity by making integrity detection an ongoing process that accumulates and validates data across multiple communication sessions. The detection mechanism operates continuously throughout the communication lifecycle, maintaining security without requiring periodic interruptions or batch processing that would increase overall processing time.
3Measurement precision
If communication protocols include error detection and authentication mechanisms, then communication accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts integrity detection functionality into a separate, dedicated component (integrity detection data such as MAC or checksum fields) that operates independently from the main data payload. This extraction allows complex verification logic to be isolated in standardized protocol elements, simplifying the overall system architecture while maintaining high communication accuracy.
Data Source
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AI summary
An image forming device is provided. The device includes a main body (100) which includes a main controller (110) controlling operations of the image forming device, a consumable unit (200) mounted on the main body to enable communication with the main controller, and a CRUM chip (210) which is provided in the consumable unit and stores usage information of the consumable unit and characteristics information The main controller and the CRUM chip transmit and receive signals which include data and integrity detection data between each other. The integrity detection data is generated by accumulating and reflecting integrity detection data included in a previous signal.