Touchscreen Force Sensor Duress Detection
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Solution Overview
Problem
Communication devices face challenges in detecting duress situations where users are coerced into entering their passwords under physical force or coercion, as existing security measures fail to differentiate between normal and forced password entry.
Innovation Solution
Incorporating force sensors and processors in communication devices to detect contact and force applied during password entry, identifying a duress condition when the input password matches a stored password with force above a predetermined threshold, and initiating a duress handling procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If force sensors are added to detect duress conditions, then security against coercion is improved, but device complexity increases
Solution Approach 1:
The patent combines force sensing capability with the existing touchscreen interface by integrating force sensors into the touchscreen structure. This merging allows the touchscreen to simultaneously perform its original input function and detect applied force for duress detection, avoiding the need for completely separate detection systems.
Solution Approach 2:
The touchscreen interface is designed to serve multiple functions: it acts as both the standard user input interface and the duress detection mechanism. By making the touchscreen universal, the system can detect both normal user interactions and duress conditions without adding separate dedicated components for each function.
2Measurement precision
If force threshold detection is implemented, then ability to detect duress is improved, but false detection risk increases
Solution Approach 1:
The patent employs variable force thresholds that can be adjusted based on different contexts and user profiles. Rather than using a fixed threshold, the system can modify the force parameter requirements to distinguish between legitimate heavy usage and actual duress situations, reducing false positives while maintaining detection sensitivity.
Solution Approach 2:
The system incorporates feedback mechanisms where the detected force patterns are analyzed in context with usage history and behavioral patterns. This feedback loop allows the system to learn from normal heavy usage patterns and adjust its detection criteria, thereby reducing false detections while maintaining accurate duress identification.
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
Effectively differentiates between normal and forced password entries, enabling the device to initiate security measures such as encryption or data deletion in duress situations, enhancing user security and data protection.
Implementation Method 1
one or more force sensors configured to detect a contact force applied on the touchscreen surface
Data Source
AI summary
A communication or computing device having a touchscreen interface is adapted to detect a duress condition upon user access through input of a gesture-based password or authentication code. One or more force sensors are provided for detection of force applied at the touchscreen surface, and interoperate with processing elements to detect input of a gesture-based password through contact at the touchscreen interface; determine that force detected by at least one of the force sensors during input of the password exceeds a predefined threshold; and compares the input password with previously stored information to determine that the input password substantially corresponds to the previously stored information. If the input password substantially corresponds to the previously stored information and the detected pressure exceeds the threshold, a duress condition is determined for the device.