Portable Control Data Deletion Using GPS Area Boundaries
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Solution Overview
Problem
Existing technologies for securing confidential data on portable control devices fail to reliably delete data when the device is outside a designated area, leading to security concerns and communication limitations due to radio wave strength thresholds, which are difficult to set and manage.
Innovation Solution
A portable control device equipped with a storage unit, position control unit, and main control unit that deletes control data based on the device's position outside a predetermined area, using satellite positioning for precise location determination, independent of radio wave strength, and allows user selection for data management across multiple areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio wave strength threshold is used to determine data deletion, then data security is improved, but communication reliability deteriorates because radio wave strength varies with layout and setting is difficult
Solution Approach 1:
The patent changes the determination parameter from radio wave strength to GPS coordinates. Instead of using signal intensity which varies with layout and is difficult to set, the system uses geographic position data to determine whether the device is within the designated area, making the threshold setting straightforward and layout-independent
Solution Approach 2:
The patent replaces the radio wave-based detection system with a satellite positioning system. The GPS-based position determination substitutes the electromagnetic wave strength measurement, providing a more reliable and easier to configure method for area verification
2Area of stationary object
If radio wave strength threshold is lowered to extend area coverage, then area coverage is improved, but data security deteriorates because data is not deleted outside designated area
Solution Approach 1:
The patent changes the area definition parameter from radio wave coverage to GPS coordinate boundaries. By using latitude and longitude coordinates to define the designated area, the system achieves precise area delimitation that is independent of radio wave propagation characteristics, ensuring both adequate coverage and secure data deletion
3Measurement precision
If GPS positioning is used instead of radio wave strength, then position accuracy is improved, but device complexity increases due to additional positioning components
Solution Approach 1:
The patent leverages the universal applicability of GPS receivers in modern portable devices. Since GPS functionality is already widely integrated into smartphones and portable terminals, adding area verification capability using existing GPS hardware does not significantly increase device complexity while providing high position accuracy
Data Source
AI summary
Provided is a portable control device (100) comprising: a storage unit (105) for storing control data that includes a program for controlling a system and data used for the program; and a position control unit (104) for acquiring the position of the device itself. The portable control device (100) includes a main control unit (103) for deleting control data from the storage unit (105) when the position acquired by the position control unit (104) is outside a first area.