Biometric Data Encryption via Quantization and One-Way Functions
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Solution Overview
Problem
Conventional biometric methods cannot be integrated with cryptography techniques due to data disorder when biometric data is encrypted, leading to security issues such as data theft and misappropriation, especially during remote comparisons.
Innovation Solution
A biometric data encryption method that quantizes biometric data using defined value ranges and a one-way function to convert it into encrypted data, allowing secure comparison and integration with cryptography techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biometric data is encrypted using conventional cryptography, then data security is improved, but the data becomes disordered and cannot be compared anymore
Solution Approach 1:
The patent introduces an intermediary quantization process between biometric data and cryptography. The quantization unit converts continuous biometric data into discrete quantized data using defined value ranges and quantization values, which serves as a mediator that allows both encryption and comparison operations to function properly.
Solution Approach 2:
The patent changes the parameter state of biometric data from continuous analog values to discrete quantized values through the quantization process. This parameter transformation enables the data to be processed by cryptographic functions while preserving comparability through the use of value ranges and thresholds.
2Adaptability or versatility
If biometric data is stored as registered feature with error tolerance, then authentication flexibility is improved, but the data cannot be protected through encryption or hash functions
Solution Approach 1:
The patent applies preliminary quantization action to biometric data before it is stored or transmitted. By pre-processing the data through quantization into discrete values within defined ranges, the system enables subsequent encryption or hashing operations while maintaining the ability to perform approximate matching for authentication.
3Device complexity
If conventional biometric comparison is performed locally, then simplicity is improved, but security against remote interception is worsened
Solution Approach 1:
The quantization process serves as an intermediary transformation that converts biometric data into a format suitable for secure transmission. The quantized data can be encrypted or hashed for remote comparison while maintaining authentication accuracy, thus mediating between local simplicity and remote security requirements.
Data Source
AI summary
A biometric method, a biometric apparatus, and a biometric data encryption method thereof are disclosed. In the biometric method and the biometric apparatus, a biometric data is quantified to obtain a quantified data. A one-way function is then performed to convert the quantified data into an encrypted data. In the present invention, the biometric data is protected through a cryptography system so as to prevent the biometric features from being stolen or misappropriated. Moreover, in the present invention, a biometric technique can be integrated with a cryptography technique.