Printer Unit Authentication via Fixed-Length Packet Termination
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Solution Overview
Problem
Existing authentication methods for electronic units, such as fixing units in printers, fail to accurately distinguish between genuine and counterfeit units due to data-shift and burst errors caused by clock synchronization issues, leading to authentication failures despite the presence of genuine units.
Innovation Solution
The electronic system employs a dividing part to split data into fixed-length sub-data, with a termination identifier appended to create a fixed-length packet, allowing for error detection and authentication, ensuring accurate identification of genuine units by detecting data errors using a termination identifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption-based authentication is used to verify genuine units, then security against counterfeit units is improved, but data-shift errors and burst errors caused by clock synchronization issues cause authentication failures even with genuine units
Solution Approach 1:
The transmission data is divided into fixed-length sub-data units, with a termination identifier appended to each. This segmentation allows the receiving device to accurately identify data boundaries and detect data-shift errors by verifying the termination identifier, thereby preventing burst errors while maintaining encryption-based authentication security.
2Device complexity
If authentication is performed without error detection, then device complexity is reduced, but data errors cause false authentication failures
Solution Approach 1:
A termination identifier is appended to the transmission data in advance, before the authentication process. This preliminary action enables the receiving device to detect data-shift errors by verifying whether the received data matches the expected termination identifier, thereby preventing false authentication failures without adding complex error correction mechanisms.
Data Source
AI summary
A printer apparatus generates a fixed-length packet by appending a termination identifier for representing a termination point of sub-data. The printer apparatus transmits the packet to a unit. Upon receiving the packet, the unit detects burst error based upon the termination identifier.