Biometric Public Code Authentication Without Stored Face Data
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Solution Overview
Problem
Biometric systems face challenges in maintaining security and privacy due to the need for exact matching of biometric data, which is difficult under non-ideal conditions and vulnerable to hacking when stored, and require high-quality equipment for consistent capture, limiting their use in common-use cases.
Innovation Solution
A method and system for generating a secure biometric code by capturing samples from multiple facial regions, combining them, and creating a complex representation that is modified and binarized to generate a binary code for authentication, using a public code that does not include any previously acquired samples, allowing for encryption and secure comparison.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biometric data is stored for comparison, then authentication can be performed, but security is compromised due to vulnerability to hacking
Solution Approach 1:
The patent extracts only the essential comparison information (public code and calibration data) from the complete biometric data, storing only this extracted portion. This allows authentication to proceed without storing the full biometric dataset, thereby reducing security vulnerabilities while maintaining authentication capability.
Solution Approach 2:
The patent creates a public code that serves as a simplified representation or copy of the biometric data. This public code can be stored and transmitted without exposing the actual biometric information, enabling authentication while protecting the original data from hacking.
2Object-affected harmful factors
If exact matching is required for biometric data, then security is improved, but the system becomes vulnerable under non-ideal conditions and requires high-quality equipment
Solution Approach 1:
The patent transforms the biometric data into a different parameter space through calibration and complex representation. The calibration data adjusts the comparison parameters to account for environmental variations, allowing the system to maintain security while adapting to non-ideal conditions without requiring expensive high-quality equipment.
3Object-affected harmful factors
If biometric data is encrypted, then security is improved, but the data still must be stored for comparison which makes it vulnerable to hacking
Solution Approach 1:
The patent extracts only the necessary public code and calibration data from the encrypted biometric information. By storing only this extracted subset rather than the complete encrypted dataset, the system reduces the quantity of stored data and minimizes the attack surface for potential hackers while maintaining authentication functionality.
4Measurement precision
If high-quality equipment is used for biometric capture, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies calibration transformations that compensate for variations in capture quality. This allows lower-cost, simpler equipment to achieve adequate measurement precision through mathematical correction of the captured data, eliminating the need for expensive high-quality capture equipment.
Data Source
AI summary
A biometric capture is performed to capture multiple regions of a biometric modality of interest, such as regions of a user's face. A complex representation of the user's biometric data is generated, such that each data point within the complex representation is based on biometric information from multiple of the captured regions. Information that later allows reconstruction of the complex representation from another capture of the user's biometric information is stored in a public code that does not include any of the underlying biometric data from the user or information that can be used to derive the underlying biometric data.