Multi-Point Touch Unlocking via Distance Change Threshold

The unlocking operation is segmented into multiple independent touch points instead of relying on a single touch point. The system requires simultaneous detection of multiple touch points at specific positions on the screen to trigger unlocking, thereby dividing the security verification into multiple spatial segments that must all be satisfied simultaneously.

The patent transitions from one-dimensional single-point touch recognition to two-dimensional multi-point spatial pattern recognition. By requiring multiple touch points distributed across different screen positions with specific geometric relationships, the system adds spatial dimensionality to the authentication process, making accidental unlocks significantly less probable.

The patent replaces complex hardware security mechanisms with software-based touch pattern recognition algorithms. Instead of using additional physical security components, the system utilizes the existing touch screen controller and processor to implement multi-point touch monitoring and geometric pattern verification, thereby achieving enhanced security through computational methods rather than mechanical additions.

The system dynamically monitors and evaluates multiple parameters including touch point positions, inter-point distances, and distance changes over time. By setting and comparing these parameters against predetermined thresholds and geometric patterns, the system achieves reliable authentication while maintaining reasonable complexity through parameter-based control rather than structural complexity.