Micro-cantilever Array Unique Identifier Generation
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Solution Overview
Problem
Existing physically unclonable functions, both macroscopic and quantum, face challenges in easily and repeatedly generating a unique response to a challenge, often requiring specialized equipment or increased time and processing power, making it difficult to quickly and accurately determine unique identifiers.
Innovation Solution
A device comprising a plurality of structures that change states in response to an input challenge, with the unique response being indicative of the sequence of state changes, facilitating a time-resolved measurement approach that is more practical and efficient than traditional methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If macroscopic physical principles (e.g., quartz crystal oscillation frequency, capacitance measurements) are used to generate unique responses, then physically unclonable functions can be implemented, but it becomes difficult to quickly and accurately determine unique identifiers due to measurement complexity
Solution Approach 1:
The patent replaces complex macroscopic measurement systems (quartz crystal oscillation frequency measurements, capacitance thickness measurements) with a simpler optical detection system. The micro-cantilevers with optical detectors provide a direct visual or electronic readout of the unique identifier based on which cantilever deflects, eliminating the need for specialized equipment to measure physical properties like frequency or capacitance.
Solution Approach 2:
The patent changes the detection parameter from measuring physical properties (frequency, capacitance) to observing mechanical deflection position. By using optical detectors to sense which micro-cantilever deflects, the system transforms the unique identifier determination into a simple position detection task rather than a complex physical measurement.
2Reliability
If quantum physical principles are used to generate unique responses, then advantages over macroscopic approaches are achieved, but it becomes difficult to quickly and easily differentiate between peaks in input-output characteristics
Solution Approach 1:
The patent replaces quantum mechanical measurement systems with a classical mechanical-optical system. Instead of measuring quantum peaks in input-output characteristics, the system uses micro-cantilevers that mechanically deflect in response to challenges, with optical detectors providing immediate visual indication of the unique identifier.
Solution Approach 2:
The patent uses optical detection which may involve light reflection or absorption changes (analogous to color changes) to indicate which micro-cantilever is active. The optical detector senses the position or state of the deflecting cantilever through light interaction, providing quick and easy differentiation without complex signal processing.
3Measurement precision
If specialized equipment or approaches are used to overcome measurement difficulties, then unique identifiers can be determined, but cost or complexity increases
Solution Approach 1:
The patent replaces specialized measurement equipment (frequency counters, capacitance meters, quantum peak analyzers) with simple optical detectors and micro-cantilever structures. The mechanical deflection of cantilevers combined with optical detection provides accurate unique identifier determination using off-the-shelf components rather than specialized instrumentation.
Solution Approach 2:
The micro-cantilevers are designed to automatically deflect to a measurable position in response to the challenge, making the unique identifier self-evident through their physical state. The system uses the structures themselves as both the source and indicator of the unique identifier, eliminating the need for complex external measurement apparatus.
4Measurement precision
If more time or processing power is allocated to determine unique identifiers, then measurement accuracy can be improved, but productivity decreases
Solution Approach 1:
The patent replaces time-consuming measurement processes with instantaneous optical detection. The micro-cantilevers respond immediately to challenges with mechanical deflection, and optical detectors provide real-time detection of the unique identifier without requiring extended measurement periods or heavy processing power.
Solution Approach 2:
The system uses periodic or pulsed challenges to the micro-cantilever array, with each pulse eliciting a rapid deflection response that is immediately detected. This periodic actuation enables quick successive measurements of unique identifiers without requiring continuous complex processing.
Data Source
AI summary
The disclosure provides a device for generating a unique response to a challenge, the device comprising: a plurality of structures, each structure being able to change from a first distinct state, to a second distinct state, in response to an appropriate input challenge; the device being arranged to facilitate a challenge of the plurality of structures in combination, by changing an input to the plurality of structures in combination, to cause each structure of the plurality of structures to change from the first distinct state, to the second distinct state; as part of the challenge, the device being arranged to facilitate a measurement of an output of the plurality of structures in combination, in response to the input; wherein the unique response is at least indicative of a sequence in which the change in state takes place for each of the plurality of structures, in response to the input.