Mobile Terminal Access Control via Acceleration Binarization
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Solution Overview
Problem
Existing security functions in mobile terminals, such as laptops, require password or fingerprint authentication upon movement, leading to inconvenience and potential device stress, as acceleration sensors are ineffective in determining control by the user versus a third party, especially when the device is carried from one location to another.
Innovation Solution
A method and system that utilize acceleration data binarization to differentiate between stationary and moving states, allowing access without authentication if the device is determined to be under user control, by measuring specific threshold periods during movement and temporary stationary states, thereby ensuring security and convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If password or fingerprint authentication is required upon device movement, then security against third-party access is improved, but user convenience and operation speed deteriorate
Solution Approach 1:
The patent applies dynamics by making the authentication requirement flexible rather than fixed. The system dynamically adjusts whether authentication is needed based on real-time acceleration data analysis. When the device is detected to be in active movement (carried by user), authentication is skipped; when stationary for extended periods, authentication is required. This dynamic approach resolves the contradiction between security and convenience.
Solution Approach 2:
The patent changes the parameter of authentication state from static (always required) to variable (conditionally required). By monitoring acceleration parameters and determining device state (stationary vs. moving), the system adjusts the authentication requirement parameter. This allows the system to maintain high security when needed while providing convenience during active use.
2Reliability
If acceleration sensor is used to detect device state, then security monitoring is improved, but accuracy in determining user control versus third-party access deteriorates
Solution Approach 1:
The patent applies preliminary action by establishing reference acceleration data during known user-controlled movement. The system stores acceleration patterns from legitimate user handling as reference data before actual security decisions are made. This preliminary data collection enables more accurate comparison and determination of whether current device state represents user control or potential third-party access.
Solution Approach 2:
The system uses feedback by continuously comparing real-time acceleration sensor data against stored reference patterns. The acceleration sensor provides ongoing feedback about device movement characteristics, and the system analyzes this feedback to determine whether the movement pattern matches expected user behavior. This feedback loop improves measurement precision in determining control status.
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 secure access without password input when the device is confirmed to be under user control, reducing stress on the device and ensuring security during brief movements, such as from an office to a meeting room.
Implementation Method 1
acceleration of the mobile terminal is binarized by the mobile terminal after a use end event is generated
Data Source
AI summary
An apparatus, computer program product, and method are disclosed for access control to a mobile terminal. A use end event is generated indicating an end of use of a mobile terminal. Acceleration of the mobile terminal is binarized by the mobile terminal after the use end event is generated to one of a first value indicating a stationary state and a second value indicating a moving state. A use start event is generated indicating a start of use of the mobile terminal. A movement preparation period is measured from a time at which the use end event is generated to a time at which a transition from the first value to the second value occurs. Use authentication is requested in response to the use start event and in response to the movement preparation period exceeding a first threshold.