Quantum Confinement Structures for Unique PUF Identifiers
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Solution Overview
Problem
Existing methods for generating unique identifiers rely on macroscopic physical effects, which can limit uniqueness, repeatability, and increase power and space consumption, making them less secure and more difficult to fabricate.
Innovation Solution
A device utilizing a plurality of structures exhibiting quantum mechanical confinement, where the unique response is derived from electrical measurements of these structures in combination, providing a unique identifier that is impossible to predict from individual responses, allowing for exponential scaling of challenge-response pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If macroscopic physical effects are used to generate unique identifiers, then the device can be fabricated with current technology, but the uniqueness and security of the identifier is limited
Solution Approach 1:
The patent transitions from macroscopic physical parameters to quantum mechanical parameters for generating unique identifiers. By utilizing quantum confinement effects and measuring quantum mechanical properties (such as energy levels, wavefunctions, and quantum states) of individually engineered structures, the system achieves exponentially higher uniqueness while remaining manufacturable through precision fabrication techniques that create structures with controlled quantum properties.
Solution Approach 2:
The patent replaces macroscopic mechanical and classical physical measurement systems with quantum mechanical measurement systems. Instead of measuring macroscopic properties like crystal oscillation frequency or layer thickness, the system measures quantum mechanical properties of confined structures, such as quantized energy levels and quantum states, thereby achieving superior uniqueness and security characteristics.
2Reliability
If macroscopic effects are used in PUF devices, then the device can provide unique identification, but power consumption and physical footprint increase
Solution Approach 1:
The patent changes the physical scale from macroscopic to quantum mechanical, utilizing quantum confinement effects in nanoscale structures. This transition enables the generation of unique identifiers through quantum mechanical measurements that require significantly less power and occupy smaller physical space compared to macroscopic PUF implementations, while maintaining or enhancing uniqueness through the inherent randomness of quantum states.
3Reliability
If macroscopic effects are used in PUF devices, then the device can provide unique identification, but the repeatability and consistency of the identifier deteriorates
Solution Approach 1:
The patent replaces macroscopic measurement systems with quantum mechanical measurement systems that exploit the inherent stability and reproducibility of quantum states. By measuring quantum mechanical properties such as energy levels and wavefunctions of confined structures, the system achieves superior repeatability and consistency, as quantum states are fundamentally stable and can be reliably prepared and measured under controlled conditions.
4Reliability
If quantum mechanical effects are used in PUF devices, then the uniqueness of responses improves, but the complexity of characterizing and cloning the device becomes impractically difficult
Solution Approach 1:
The patent transitions to quantum mechanical parameters for device characterization, measuring quantum states, energy levels, and wavefunctions instead of macroscopic properties. This change creates exponentially higher uniqueness in device responses while making characterization and cloning impractically difficult, as quantum states are inherently probabilistic and cannot be precisely predicted or replicated without knowing the complete quantum mechanical description of the device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device generates highly unique and repeatable responses with low power consumption and small physical footprint, significantly enhancing security by making it impractically difficult to characterize and clone, thus providing robust cryptographic keys.
Implementation Method 1
a plurality of structures, each structure exhibiting quantum mechanical confinement, and each structure being arranged to provide a unique response when challenged with an electrical measurement, the unique response being linked to the atomic makeup of the structure that defines the quantum mechanical confinement
Data Source
AI summary
According to a first aspect of the invention, there is provided a device for generating a unique response to a challenge, the device comprising: a plurality of structures, each structure exhibiting quantum mechanical confinement, and each structure being arranged to provide a unique response when challenged with an electrical measurement, the unique response being linked to the atomic makeup of the structure that defines the quantum mechanical confinement; the device being arranged to facilitate a challenge of at least two structures of the plurality in electrical combination to generate the unique response, by facilitating an electrical measurement of an output of the at least two structures of the plurality in electrical combination; the unique response being derivable from the electrical measurement.