Biometrics Authentication Device with Scrambled Data Transmission
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Solution Overview
Problem
Existing biometrics authentication systems lack adequate security measures for biometrics information transmitted between sensors and external devices, leading to potential data leakage and an excessive processing burden on IC cards.
Innovation Solution
A biometrics authentication device that scrambles and transmits biometrics data, utilizing an external control unit to perform primary verification and an IC card for secondary verification, reducing the processing load on the IC card and enhancing security by storing sensitive data in a scrambled state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If biometrics characteristic data is transmitted between sensors and external devices without adequate security measures, then data processing burden on IC cards is reduced, but security of biometrics information deteriorates and data leakage risk increases
Solution Approach 1:
The patent applies preliminary action by performing scrambling of biometrics characteristic data before transmission between the sensor and external device. The control unit scrambles the characteristic data obtained from the sensor prior to transmitting it to the IC card, and also scrambles verification data before transmission. This preliminary security measure reduces the processing burden on the IC card while maintaining security throughout the data transmission chain.
Solution Approach 2:
The control unit acts as an intermediary that handles the scrambling and descrambling operations. It receives characteristic data from the sensor, scrambles it, transmits to the IC card, receives verification data, scrambles it, transmits back, and finally descrambles for comparison. This intermediary approach protects the IC card from handling unscrambled sensitive data while ensuring security requirements are met.
2Reliability
If security measures are strengthened by processing data on the IC card, then security of biometrics information is improved, but processing burden on IC cards increases
Solution Approach 1:
The patent extracts the security-critical scrambling and descrambling operations from the IC card and places them in the control unit. The IC card only performs the essential verification function by comparing scrambled characteristic data with scrambled verification data, without needing to process or decode the actual biometrics information. This extraction reduces the IC card's processing burden while maintaining security through the scrambled data comparison.
3Productivity
If biometrics characteristic data is stored in unscrambled state for easy verification, then verification speed is improved, but security deteriorates and data leakage risk increases
Solution Approach 1:
The control unit performs preliminary scrambling of both the characteristic data and verification data before they reach the IC card. This allows the IC card to perform rapid verification by directly comparing the scrambled data without needing to unscramble it first. The verification speed is maintained through this preliminary preparation, while security is enhanced because the sensitive biometrics information remains scrambled throughout the verification process.
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
This approach enhances security by minimizing data processing on the IC card and reducing the risk of data leakage, while efficiently managing authentication tasks between the external device and IC card, thereby improving overall system security and performance.
Implementation Method 1
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Data Source
AI summary
A biometrics authentication device uses biometrics information to perform individual authentication. Primary and secondary verification of biometrics characteristic data from an image capture device are performed by a control unit and IC card. The biometrics character data is scrambled and transmitted between devices. The second registration data which is more important to authentication is stored within the IC card, and first registration data is registered in the IC card in a scrambled state. Security is improved, and moreover the load on the CPU of the IC chip in the IC card is reduced.