Motion-Based Authentication Using Magnified User Movements
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Solution Overview
Problem
Traditional authentication methods are vulnerable to observation-based attacks, as they rely on visible credentials that can be easily intercepted by bystanders, necessitating a more secure and imperceptible authentication mechanism.
Innovation Solution
A motion-based authentication system that uses an image capture device to record and magnify user motions, processing these motions to determine unique characteristics, which are then used as encrypted credentials for authentication, thereby providing a secure and imperceptible authentication method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication credentials (username/password/PIN) are used, then authentication functionality is provided, but security is compromised due to vulnerability to shoulder-surfing attacks
Solution Approach 1:
The patent replaces traditional mechanical/visual credential entry (typing passwords or PINs) with motion-based authentication. An imaging device captures video of user motions, which are then processed to extract motion characteristics for authentication. This substitution eliminates the visual exposure problem of traditional credentials while maintaining authentication functionality.
Solution Approach 2:
The patent introduces motion characteristics as an intermediary between the user and the authentication system. Instead of directly exposing passwords or PINs, the system captures intermediate motion data through video recording, processes it to extract unique characteristics, and uses these characteristics for authentication. This intermediary layer protects the actual authentication credentials from direct observation.
2Reliability
If motion-based authentication is implemented, then security against observation attacks is improved, but device complexity increases due to video capture and motion processing requirements
Solution Approach 1:
The patent leverages the imaging device's existing video capture capability for multiple purposes. The same imaging device used for general display or user interaction can also capture motion data for authentication. This multi-functionality reduces the need for separate dedicated hardware, thereby limiting the increase in device complexity.
Solution Approach 2:
The system uses the device's own imaging capabilities to capture authentication data, eliminating the need for external or specialized authentication hardware. The motion processing and characteristic extraction are performed using the device's existing computational resources, allowing the system to authenticate itself without additional complex components.
3Reliability
If small imperceptible motions are used as credentials, then security is enhanced by making authentication invisible to observers, but measurement precision requirements increase to capture and analyze these subtle motions
Solution Approach 1:
The patent transforms the authentication problem from analyzing subtle spatial movements to analyzing temporal patterns and trajectories. By examining motion across multiple video frames and extracting characteristics such as motion vectors, acceleration patterns, and temporal sequences, the system can detect imperceptible motions with sufficient precision using standard imaging capabilities.
Data Source
AI summary
Systems and methods are provided which allow for motion-based authentication of a user using magnified motion. Very small or imperceptible motions of a user may be captured and magnified to determine characteristics of the motions that may be used as a motion-based credential for user authentication. The motions, which may be very small and imperceptible to an observer, may be difficult for potential attackers to observe and copy, but may be useful when magnified.