Print Component Sensor Circuitry for Dual-Address Authentication
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Solution Overview
Problem
Existing communication protocols between print apparatus and replaceable print components, such as those using the I2C protocol, face challenges in efficiently managing multiple addresses and validation processes, particularly in ensuring the authenticity and integrity of print material components, which can impact the reliability and security of print operations.
Innovation Solution
The implementation of a logic circuitry package with dual addresses, where the first address is used for primary communication and the second address is activated for specific tasks or validation processes, allowing for secure and efficient communication and validation of print material components, including the use of cryptographic authentication for secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cryptographic authentication and dual address validation are implemented, then security and reliability of print operations are improved, but device complexity and processing time increase
Solution Approach 1:
The logic circuitry package is segmented into multiple functional blocks including first logic circuitry for I2C communication, second logic circuitry for cryptographic authentication, and validation logic. This segmentation allows each block to perform its specific function independently, managing complexity through modular design while maintaining high security standards.
Solution Approach 2:
The logic circuitry package acts as an intermediary component between the replaceable print component and the print apparatus. It mediates all communications and validation processes, providing a controlled interface that enhances security without requiring changes to the main print apparatus architecture.
2Reliability
If dual address validation process is implemented, then security against unauthorized components is improved, but communication efficiency decreases
Solution Approach 1:
Cryptographic authentication and dual address validation are performed preliminarily during the component installation and initial communication phases. Once validated, the system establishes a trusted communication channel that can operate efficiently without repeating the full validation sequence, thus balancing security with communication speed.
Solution Approach 2:
The validation process applies different levels of scrutiny to different communication aspects. Critical authentication data undergoes rigorous cryptographic verification, while routine operational communications use simplified validation. This localized quality approach ensures high security where needed while maintaining overall communication efficiency.
3Measurement precision
If cryptographic authentication is used, then authenticity verification is improved, but processing time increases
Solution Approach 1:
The cryptographic authentication process uses optimized parameters including pre-computed hash values, efficient encryption algorithms, and parallel processing where possible. These parameter optimizations maintain high verification accuracy while minimizing the time penalty associated with cryptographic operations.
Data Source
AI summary
A sensor circuit for a replaceable print apparatus component comprises an interface to transmit signals with respect to a print apparatus logic circuit, and further comprises, connected to the interface, at least two sensor cell arrays, each array including nominally the same cells, the cells of one array being nominally different than the cells of the other array, and at least one single cell sensor that is nominally different than the other cells.