Variable Resistance Power Supply for Consumable Authentication
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Solution Overview
Problem
The challenge is to prevent the use of copied consumables with cloned authentication chips in original consuming devices, while making the production of such clones unprofitable.
Innovation Solution
A consuming device is designed with a power supply for an authentication chip, where the internal resistance of the power supply is variable, allowing the device to capture information about the authentication chip's operating state for various internal resistance values and determine its dependence on the power supply resistance. This information is used by an authentication circuit to authorize the use of the consumable component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If authentication chips are used to protect consumable components, then the ability to establish originality is improved, but the risk of cloning the authentication chip increases
Solution Approach 1:
The patent applies parameter changes by varying the internal resistance of the power supply to create different operating conditions for the authentication chip. The detection device measures operating state parameters (such as current consumption, processing speed, or clock frequency) at multiple resistance values, and the authentication is based on the characteristic dependence of these parameters on the internal resistance. This dynamic parameter-based authentication makes cloning difficult because the clone would need to replicate not just the static chip behavior but the specific dynamic response characteristics across varying power supply conditions.
2Measurement precision
If the internal resistance of the power supply is made variable to detect authentication chip characteristics, then the precision of authentication is improved, but the complexity of the consuming device increases
Solution Approach 1:
The patent implements dynamics by making the power supply's internal resistance variable rather than fixed. The detection device captures operating state information at multiple resistance values, creating a dynamic authentication process. This dynamic approach improves measurement precision because it captures the characteristic response curve of the authentication chip across different operating conditions, making it harder for clones to replicate. The complexity increase is managed by automating the resistance variation and measurement process through the consuming device's control system.
Data Source
AI summary
In accordance with one embodiment, a consuming device is provided, comprising a power supply for an authentication chip of a consumable component, wherein the internal resistance of the power supply is variable, a detection device configured to capture information about an operating state of the authentication chip for a plurality of values of the internal resistance of the power supply and to determine a dependence of the operating state of the authentication chip on the internal resistance of the power supply, and an authentication circuit configured to authorize the use of the consumable component by the consuming device based on the determined dependence.