Supply Item Chip Authentication for Imaging Usage Metering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for secure communication and trust establishment between supply items, such as toner cartridges, and imaging devices, particularly in ensuring authorized usage tracking and preventing counterfeiting.
Innovation Solution
A chip in the supply item stores quanta and multipliers correlated to toner mass, with the imaging device using certificates to manage usage and enforce secure communication through I2C bus authentication and encryption protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secure communication protocols and authentication certificates are implemented between supply item and imaging device, then security and trust establishment are improved, but device complexity and communication overhead increase
Solution Approach 1:
Authentication certificates and encryption keys are pre-loaded into the supply item chip during manufacturing. The imaging device also has pre-configured authentication data. This preliminary setup eliminates the need for complex runtime authentication negotiations, reducing communication overhead while maintaining security.
Solution Approach 2:
The patent uses certificate copies and encrypted data replicas stored in the supply item chip. Instead of transmitting complex authentication protocols, the system exchanges simplified certificate tokens that represent full authentication credentials, reducing communication complexity while maintaining security verification.
2Reliability
If usage tracking and metering systems are implemented to monitor supply item consumption, then authorized usage control is improved, but device complexity and processing requirements increase
Solution Approach 1:
The supply item chip autonomously tracks its own usage by monitoring communication exchanges with the imaging device. It automatically decrements its internal quantum counter based on actual usage, eliminating the need for complex centralized tracking systems. The chip self-manages authentication, usage recording, and authorization verification.
Solution Approach 2:
The system implements real-time feedback loops where the supply item continuously reports its remaining quantum balance to the imaging device controller. The controller uses this feedback to dynamically adjust operational parameters and prevent unauthorized usage before it occurs, simplifying the overall control architecture through continuous monitoring.
3Measurement precision
If quantum-based usage limits are stored and enforced in the supply item chip, then usage authorization precision is improved, but memory requirements and data management complexity increase
Solution Approach 1:
The patent transforms detailed usage tracking data into compressed quantum parameters that represent aggregate usage limits. Instead of storing granular consumption records, the system uses quantized usage units that can be precisely tracked with minimal memory. This parameter transformation maintains authorization precision while dramatically reducing storage requirements.
4Reliability
If encrypted firmware and certificate verification are performed during initialization, then security trust establishment is improved, but initialization time and operational downtime increase
Solution Approach 1:
All encryption keys, certificates, and authentication data are pre-configured in both the supply item chip and imaging device before operation begins. During initialization, the system only needs to verify pre-computed cryptographic signatures rather than performing full authentication handshakes, dramatically reducing initialization time while maintaining security.
Data Source
AI summary
A supply item has toner for use in an imaging device. A chip has memory storing quanta indicating allowed usage of the supply item over its lifetime and a multiplier correlating the quanta to toner mass. The imaging device requires quanta to conduct imaging operations and loads the quanta and multiplier by way of a certificate stored in the memory. The imaging device retrieves quanta from the chip over time and both devices keep tally. Initialization between the supply item and imaging device includes providing encrypted and unencrypted instances of firmware versions and certificates from the supply item that the imaging device can compare for security. Alternatively, the supply item defines a fuser assembly, imaging unit, intermediate transfer member, or other component installed for use in the imaging device.