Biometric Reader Emulating Wiegand Card Codes
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Solution Overview
Problem
Existing card-based access control systems require complex integration and significant computing power to incorporate biometric features, necessitating additional databases and enrollment procedures, which complicates the process and consumes resources.
Innovation Solution
A biometric reader that processes biometric data to generate a unique numerical code in the format of an access card number, allowing seamless integration with existing card-based systems without the need for separate biometric data storage or user enrollment, using a processor to convert biometric data into a Wiegand-compatible code for access control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If biometric access control is integrated into an existing card-based system, then user authentication capability is improved, but system complexity and database requirements increase significantly
Solution Approach 1:
The system separates biometric data processing from the central access control database. The biometric reader independently processes fingerprints and generates access codes, while the main database only stores user information and card numbers. This segmentation eliminates the need for complex biometric database integration.
Solution Approach 2:
The invention introduces an intermediary conversion process where biometric data is transformed into standard access card format codes. This intermediary step allows biometric authentication to communicate with the existing card-based system through the Wiegand interface, without requiring direct database integration.
2Measurement precision
If biometric data is stored in a separate database, then authentication accuracy is improved, but memory consumption and computing power requirements increase
Solution Approach 1:
The system extracts only the essential access control function from biometric authentication. Instead of storing complete biometric templates, the reader processes biometric data locally and extracts only the access grant/deny decision and generated card number, which are then transmitted to the access control panel.
Solution Approach 2:
The biometric data processing is performed as a temporary, disposable operation at the reader level. Each biometric authentication is processed independently and immediately, with no persistent storage of biometric information in the central database, reducing long-term memory requirements.
3Reliability
If enrollment procedures are implemented for biometric credentials, then system security is improved, but ease of operation deteriorates due to complex enrollment processes
Solution Approach 1:
The system merges biometric enrollment with the existing card enrollment process. When a user enrolls their card, their biometric data is automatically captured and linked to the same user record in the access control database. This combined enrollment eliminates separate biometric registration steps.
Solution Approach 2:
The biometric reader performs automatic enrollment by capturing biometric data during the normal card enrollment process. The system self-configures the biometric authentication without requiring manual intervention or separate enrollment procedures from administrators or users.
4Adaptability or versatility
If biometric readers generate unique codes in access card format, then compatibility with existing systems is improved, but the complexity of code generation and conversion increases
Solution Approach 1:
The biometric reader changes the parameter representation of biometric data by converting it into the standard numerical format used by access card systems. The Wiegand interface protocol defines specific bit formats for card numbers, and the reader transforms biometric authentication results to match these predefined parameter structures.
Solution Approach 2:
Instead of having the access control system adapt to biometric data formats, the invention inverts the approach by having the biometric reader adapt to the access control system's required format. The reader generates codes in the format that the existing card-based system expects, eliminating the need for system-wide format changes.
Data Source
AI summary
A biometric access-control system is disclosed, wherein the system is compatible with access cards, comprising a biometric reader that converts biometric data to emulate an access card number, wherein only the emulated access card number is stored in a database.