Wearable Biometric Authentication via Continuous Sensor Matching
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Solution Overview
Problem
Existing authentication methods disrupt user activity and are not suitable for continuous, secure verification, especially in high-security environments like military operations or health monitoring, where interrupting the user to re-enter credentials or use biometric devices is undesirable.
Innovation Solution
A user-wearable device equipped with sensors like ECG, PPG, capacitive, galvanic skin resistance, and optical sensors continuously authenticates a user by matching biometric data with pre-stored baseline information, allowing secure and efficient access without explicit user intervention, and maintains authentication as long as the device is worn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication methods (password entry, biometric devices) are used, then security verification is achieved, but user activity is interrupted and efficiency is reduced
Solution Approach 1:
The system performs continuous authentication in the background without interrupting user activity. Sensors continuously monitor biometric data (ECG, PPG, galvanic skin resistance) and compare it against stored baseline data, maintaining authentication status throughout the user's interaction with the device while they perform their primary tasks uninterrupted.
Solution Approach 2:
The authentication system operates autonomously by automatically collecting biometric data from sensors, comparing it against baseline data, and determining authentication status without requiring any user action. The system serves itself by managing the entire authentication process in the background, eliminating the need for users to manually enter credentials or interact with authentication interfaces.
2Reliability
If continuous authentication monitoring is implemented, then security is maintained without interruption, but device complexity increases
Solution Approach 1:
The patent employs multiple sensor types (ECG, PPG, galvanic skin resistance) that can serve both authentication purposes and additional functions such as health monitoring and activity tracking. This multi-functionality allows the same hardware infrastructure to support continuous authentication while providing value-added services, thereby justifying the increased device complexity through enhanced versatility.
3Reliability
If multiple biometric sensors are used for continuous authentication, then authentication reliability is improved, but energy consumption increases
Solution Approach 1:
Instead of continuously activating all sensors at full power, the system employs periodic sampling and event-driven monitoring. Sensors are activated at intervals or triggered by specific events (such as detected motion or changes in baseline parameters), allowing the system to maintain authentication reliability while significantly reducing average power consumption compared to continuous full-power operation of all sensors.
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
Enables continuous, secure, and efficient user authentication without interrupting the user's activity, ensuring secure access to data and systems while monitoring health metrics and maintaining high-security standards.
Implementation Method 1
an electrocardiogram (ECG) sensor that senses an ECG signal from the user
Implementation Method 2
a photoplethysmography (PPG) sensor that senses a PPG signal from the user
Implementation Method 3
a capacitive sensor that senses a metric of capacitance
Implementation Method 4
a galvanic skin resistance sensor that senses a metric of galvanic skin resistance
Implementation Method 5
an optical sensor that operates as an ambient light sensor and that senses a metric of ambient light
Data Source
AI summary
A user-wearable device includes a housing and a band that straps the housing to a portion of a user's body (e.g., wrist). One or more skin contact sensors in and/or on the housing can sense biometric information of a user wearing the device. An authentication module performs or receives results of an authentication determination that compares the sensed biometric information to baseline biometric information to determine whether they match. An on-body detector uses one or more of the sensors to determine whether the device is being worn by a user. After a user is authenticated based on a match between the sensed and baseline biometric information, the authentication module continually concludes that the user is authenticated for at least a period of time, without an additional comparison between sensed and baseline biometric information, if the on-body detector detects that the user-wearable device is still being worn by the user.