Secure Reprocessing of Replaceable Supply Components
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Solution Overview
Problem
Existing replaceable supply components in devices like printers and fluid dispensers have limited reprogrammability, making it difficult to securely update or reconfigure them, especially when reprocessed or remanufactured, which can lead to security risks and functionality issues.
Innovation Solution
A method to securely append and authenticate data on the memory of replaceable supply components, allowing for reconfiguration of end-user devices by designating them as reprocessed, using cryptographic techniques and secure data structures to ensure authenticity and authorization, even when the device is not network-connected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If replaceable supply components are made reprogrammable to allow updates, then adaptability and functionality are improved, but security risks increase due to potential unauthorized modifications
Solution Approach 1:
The patent implements preliminary authorization verification before allowing any reprocessing or reprogramming of the supply component. The system checks authorization status in advance and only permits data modification when proper authorization is confirmed, preventing unauthorized modifications while allowing legitimate updates.
Solution Approach 2:
The patent introduces an intermediary authorization verification mechanism that mediates between the desire to reprogram supply components and the need to maintain security. This intermediary layer validates authorization credentials before allowing any reprocessing operations, ensuring security while enabling adaptability.
2Productivity
If supply components are designated as reprocessed, then productivity and resource utilization are improved, but difficulty in detecting and measuring authenticity increases
Solution Approach 1:
The patent uses visual indicators (analogous to color changes) through icons and indicators that change based on the authorization status and reprocessing state of the supply component. These visual cues make it easy to detect and measure the authenticity and status of reprocessed components without complex detection mechanisms.
Solution Approach 2:
The patent implements a feedback mechanism that provides real-time status information about the supply component's authorization and reprocessing state. The system continuously monitors and communicates the authenticity status through user interface indicators, making detection and verification straightforward.
3Reliability
If cryptographic authentication is implemented for reprocessed components, then security is improved, but device complexity increases
Solution Approach 1:
The patent extracts the complex cryptographic authentication logic from the end-user device and places it in the supply component itself and on remote servers. The device only needs to perform simple verification operations, reducing its complexity while maintaining strong security through centralized cryptographic processing.
Solution Approach 2:
The supply component performs self-authentication using embedded cryptographic credentials. The component independently verifies its own authorization status and provides authentication information without requiring complex verification mechanisms in the host device, reducing overall system complexity.
Data Source
AI summary
An example method comprising requesting authorization to reprocess a replaceable supply component using an interface and original manufacturing data stored in memory of the replaceable supply component. The method further comprises, in response to the request, receiving configuration data using the interface, and appending the original manufacturing data with the configuration data to designate the replaceable supply component as reprocessed, wherein the configuration data is to cause reconfiguration of an end-user device in response to attachment of the replaceable supply component to the end-user device and execution by the end-user device.