Signature Tree Attestation for Interrupt-Resilient Quantum Security
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Solution Overview
Problem
Devices with limited processing capacity and resources face challenges in implementing complex cryptographic schemes to defend against quantum computer attacks, particularly in providing reliable attestation of data to external entities.
Innovation Solution
A method involving the initialization of multiple signature trees with limited height parameters, where each tree generates a finite number of signatures, and switching to a new tree upon interruption or signature exhaustion, ensuring continuous attestation capability and protection against side-channel attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex cryptographic schemes are implemented to defend against quantum computer attacks, then security against quantum attacks is improved, but device resource consumption increases
Solution Approach 1:
The cryptographic scheme is segmented into multiple signature trees, where each tree handles a specific portion of the attestation workload. This segmentation allows the device to distribute computational tasks across multiple smaller structures rather than relying on a single complex scheme, reducing the resource burden on individual components while maintaining overall security against quantum attacks.
Solution Approach 2:
Signature trees are pre-generated and stored on the device before attestation is needed. This preliminary action allows the device to have cryptographic credentials ready in advance, eliminating the need for complex real-time key generation during attestation operations. The pre-computed signature trees can be efficiently used to prove device identity without consuming excessive processing resources at the time of attestation.
2Reliability
If signature trees are generated and stored on the device, then attestation capability is improved, but storage requirements increase
Solution Approach 1:
The attestation capability is divided into multiple signature trees, each representing a separate credential or identity aspect. By segmenting the overall attestation function into discrete trees, the system can manage storage more efficiently by only loading and processing the specific tree needed for a given attestation request, rather than maintaining all cryptographic material in active memory simultaneously.
Solution Approach 2:
The signature trees are designed as disposable cryptographic objects that can be generated, used, and discarded. Each signature tree is intended for limited use and can be replaced when needed. This approach allows the system to store multiple signature trees without long-term retention requirements, enabling efficient storage management where trees can be rotated out and replaced rather than permanently archived.
3Reliability
If multiple signature trees are generated immediately, then continuous attestation capability is improved, but computational overhead increases
Solution Approach 1:
Multiple signature trees are generated and stored in advance before attestation operations begin. This preliminary generation eliminates the need for complex real-time tree switching or generation during attestation, as the device simply selects from pre-prepared trees. The computational work of tree generation is performed during device initialization or maintenance periods rather than during active attestation operations.
Solution Approach 2:
The signature tree structure is designed to be self-sufficient, with each tree containing all necessary cryptographic material to independently perform attestation. This self-service design allows the device to switch between trees without requiring complex coordination or regeneration operations, reducing computational overhead during tree transitions while maintaining continuous attestation capability.
Data Source
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AI summary
A method and system are provided wherein an attestation of data on a device can be provided reliably whilst mitigating the risk of side channel attacks and interruption events.