Automotive mm-Wave Radar Fingerprint Authentication Without Physical Keys
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Solution Overview
Problem
Conventional user authentication systems for vehicles, particularly those relying on physical keys, are susceptible to unauthorized access if the key is lost or stolen, and they lack advanced biometric authentication methods to ensure secure entry and operation.
Innovation Solution
A millimeter-wave radar system that detects user proximity and transmits radiation pulses to capture fingerprint and gesture signatures, comparing them to authorized databases to authenticate users, thereby eliminating the need for physical keys and enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical keys are used for authentication, then ease of operation is improved, but reliability deteriorates due to susceptibility to loss or theft
Solution Approach 1:
The patent replaces mechanical key-based authentication systems with a millimeter-wave radar-based biometric authentication system. The radar sensor captures fingerprint images and gesture information wirelessly, eliminating the need for physical keys and thereby resolving the security vulnerability while maintaining ease of operation.
Solution Approach 2:
The patent creates a digital copy of the user's fingerprint and gesture patterns through millimeter-wave radar imaging. This digital biometric template is stored and used for authentication, replacing the physical key copy problem with a secure, unique biometric identifier that cannot be easily replicated.
2Reliability
If millimeter-wave radar is used for biometric authentication, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple authentication functions (fingerprint recognition, gesture recognition, proximity detection) into a single millimeter-wave radar system. This multi-functional approach achieves high reliability through biometric authentication while avoiding the need for multiple separate sensors, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent combines fingerprint imaging and gesture recognition capabilities within the same millimeter-wave radar sensor and processing system. By merging these functions into a unified system rather than using separate sensors, the patent achieves reliable biometric authentication while minimizing the increase in device complexity.
3Device complexity
If conventional authentication systems are used, then device complexity is reduced, but object-affected harmful factors increase due to unauthorized access risks
Solution Approach 1:
The patent replaces conventional mechanical key-based authentication with millimeter-wave radar biometric authentication, thereby reducing unauthorized access risks while keeping device complexity manageable through integrated sensor design.
Solution Approach 2:
The patent introduces millimeter-wave radar as an intermediary between the user and the authentication system. This intermediary captures biometric data wirelessly and processes it through encrypted communication protocols, reducing direct exposure to harmful factors like key theft while maintaining acceptable device complexity.
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
The system securely authenticates users without relying on physical keys, reducing unauthorized access and replication risks, while providing a robust and accurate biometric authentication method resistant to image distortion and electromagnetic interference.
Implementation Method 1
transmitting a plurality of radiation pulses through a predetermined portion of a surface of the car towards a portion of a hand of the user using the millimeter-wave radar of the car; receiving a reflected signal from the portion of the hand using the millimeter-wave radar
Implementation Method 2
receiving a reflected signal from the portion of the hand using the millimeter-wave radar
Data Source
Figure 1~2
Figure 3A~3C
Figure 3D~3E
AI summary
In an embodiment, a method for authenticating a user of a car includes: transmitting a plurality of radiation pulses through a predetermined portion of a surface of the car towards a portion of a hand of the user using a millimeter-wave radar; receiving a reflected signal from the portion of the hand using the millimeter-wave radar; generating a fingerprint signature based on the reflected signal; comparing the fingerprint signature to a database of authorized fingerprint signatures; and authorizing the user based on whether the fingerprint signature matches an authorized fingerprint signature of the database of authorized fingerprint signatures.