Integrated Fingerprint Module with Encrypted Comparison for Electric Locks
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Solution Overview
Problem
Existing electric locks with fingerprint recognition functions have independent fingerprint receiving, storage, and recognition modules, making them vulnerable to data theft and hacking since stored fingerprint data can be easily read and copied by external devices.
Innovation Solution
Integration of the fingerprint sensing and recognition units into a single chip, with encrypted comparison results transmitted to a control circuit, ensuring secure storage and communication using encryption methods like MD5, AES, or RSA, and storing only feature points and their positions to prevent data exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the fingerprint receiving module, fingerprint storage module and fingerprint recognition module are independent components, then the device complexity is low and ease of manufacture is improved, but the security is worsened because the stored fingerprint data can be easily read and copied by external electronic devices
Solution Approach 1:
The patent merges the fingerprint receiving module, fingerprint storage module, and fingerprint recognition module into a single integrated fingerprint module. This integration ensures that when the housing is opened, the fingerprint data cannot be easily accessed or copied by external devices, as the storage and processing functions are unified within the secure housing rather than being separate accessible components.
2Measurement precision
If the fingerprint storage module stores complete fingerprint images, then the recognition accuracy is improved, but the data storage requirement increases and the security is worsened
Solution Approach 1:
The patent extracts only the essential feature points and their positions from complete fingerprint images for storage in the fingerprint storage module. This extraction process retains the critical information needed for accurate fingerprint recognition while significantly reducing the data storage requirements and enhancing security by storing minimal necessary data.
Solution Approach 2:
The patent changes the representation parameters of fingerprint data from storing complete images to storing only feature point coordinates and positional information. This parameter transformation maintains recognition accuracy by preserving the essential characteristics of fingerprints while dramatically reducing storage requirements and security risks.
3Speed
If the comparison result is transmitted without encryption, then the processing speed is improved, but the security is worsened
Solution Approach 1:
The patent applies encryption to the comparison result before transmission from the fingerprint recognition module to the control circuit. This preliminary encryption action ensures that even if the transmitted data is intercepted, the fingerprint information remains secure, while the encryption process is designed to minimize impact on processing speed.
Data Source
AI summary
An electric lock includes a fingerprint module and a control circuit. The fingerprint module includes a fingerprint sensing unit configured to sense a fingerprint image of a user, and a fingerprint recognition unit electrically connected to the fingerprint sensing unit and configured to compare the fingerprint image of the user with registered fingerprint data pre-stored in the fingerprint recognition unit to generate a comparison result. The control circuit is electrically connected to the fingerprint recognition unit, and configured to control the electric lock to perform a predetermined operation according to the comparison result. The fingerprint sensing unit and the fingerprint recognition unit are integrated and packaged in a same chip, and the comparison result is transmitted from the fingerprint recognition unit to the control circuit after being encrypted according to a predetermined encryption method.