Magnetometer-Based Mobile Device Verification Method
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Solution Overview
Problem
Conventional verification methods for mobile devices, such as adding visual noise and distorted characters or questions, negatively impact user experience due to difficulty in inputting information, especially on mobile devices.
Innovation Solution
A method using a magnetometer to verify users by generating a direction image indicating positions on a mobile device, where the user rotates the device to align a marked position with a North Magnetic Pole, and the magnetometric numerical value is used to determine access, eliminating the need for users to input verification codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual noise and distortion are added to verification codes, then security is improved, but user experience deteriorates due to difficulty in distinguishing characters
Solution Approach 1:
The patent replaces the visual character recognition system with a magnetic field sensing system. Instead of requiring users to visually distinguish distorted characters, the system uses the magnetometer to detect the magnetic field direction when the device is oriented in a specific direction, substituting optical recognition with magnetic field detection to resolve the contradiction between security and usability
Solution Approach 2:
The patent introduces a direction image as an intermediary between the verification system and the user. The direction image provides visual guidance for device orientation without requiring character recognition, serving as a mediator that maintains security through magnetic field detection while improving user experience through intuitive directional guidance
2Reliability
If conventional verification codes are used, then security is maintained, but user interaction is degraded due to difficulty in inputting information on mobile devices
Solution Approach 1:
The patent implements self-service verification where the system automatically detects the magnetometric value based on device orientation without requiring manual input from the user. The verification process serves itself by utilizing the device's built-in magnetometer and automatic orientation detection, eliminating the need for users to type verification codes and thereby resolving the contradiction between security and input ease
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
This approach enhances user experience by simplifying the verification process and improving the effectiveness of distinguishing legitimate users from attackers without degrading user interaction.
Implementation Method 1
a magnetometric numerical value detected by the mobile device using a magnetometer
Data Source
AI summary
A method for verifying a user of a mobile device is provided. The method includes selecting a numerical value and generating a direction image based on the numerical value. The direction image may indicate a first position on the direction image and a second position on the mobile device when the direction image is initially displayed on the mobile device. The direction image may have a center point and the numerical value may correspond a central angle between the first position and the second position. The method may further include sending, to the mobile device, the direction image and a command to rotate the mobile device according to the direction image and receiving a magnetometric numerical value detected by the mobile device using a magnetometer. The method may further include determining whether to allow access of a server by the user based on the magnetometric numerical value.