Biometric Device Attestation via Cryptographic Engine
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Solution Overview
Problem
Current biometric authentication systems lack standardized techniques to verify the integrity of biometric devices in remote, unsupervised environments, such as cloud services, making them vulnerable to malware and physical tampering, and there are no effective methods for cloud services to distinguish between genuine and malicious requests.
Innovation Solution
Implementing a cryptographic attestation system with a secure attestation key storage and protection logic within biometric devices to ensure the integrity of the authentication process, using a cryptographic engine to generate and verify signatures, and employing Direct Anonymous Attestation (DAA) to maintain user privacy while ensuring device authenticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If biometric devices are deployed in remote, unsupervised environments (e.g., cloud services), then accessibility and convenience are improved, but security and integrity protection deteriorate due to vulnerability to malware and physical tampering
Solution Approach 1:
The system separates the biometric authentication function from the host system by implementing a standalone attestation mechanism. The attestation key storage is segmented as a separate secure component within the biometric device, isolated from the main processing units and external interfaces, thereby providing security even when deployed in unsupervised remote environments.
Solution Approach 2:
The patent introduces an intermediary attestation process that acts as a mediator between the biometric device and the cloud service. The attestation key and its cryptographic verification mechanism serve as an intermediary layer that proves device integrity without requiring direct supervision or trust in the host system, enabling secure remote operation.
2Reliability
If standardized verification techniques are implemented to ensure device integrity, then security is improved, but system complexity increases due to additional cryptographic mechanisms
Solution Approach 1:
The patent extracts the critical security function (attestation key storage and verification) from the complex biometric processing system. By isolating the attestation key in a dedicated secure storage component with separate protection logic, the system provides standardized integrity verification without requiring the entire biometric system to be overly complex.
Solution Approach 2:
The attestation key is pre-loaded into the secure storage during device manufacturing or initialization, before the device is deployed. This preliminary action ensures that the verification mechanism is already in place and does not require complex runtime setup or configuration, reducing overall system complexity while maintaining security.
3Reliability
If protection logic is integrated within the attestation key storage to prevent tampering, then security is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the protection logic directly with the attestation key storage component, creating an integrated secure element. This combination ensures that the key storage and its protection mechanisms are implemented as a single unified component, which can be manufactured as a standardized module, thereby limiting the increase in manufacturing complexity while achieving strong tamper resistance.
Data Source
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AI summary
A system, apparatus, method, and machine readable medium are described for biometric device attestation. For example, one embodiment of an apparatus comprises: a biometric device to read biometric authentication data from a user and determine whether to successfully authenticate the user based on a comparison with biometric reference data; and a cryptographic engine to establish communication with a relying party and to attest to the model and/or integrity of the biometric device to the relying party.