Touch Panel Display Tamper Detection for Secret Information Input
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Solution Overview
Problem
Existing information processing devices with touch panels for inputting secret information lack sufficient security measures to prevent unauthorized access and tampering.
Innovation Solution
Incorporating a touch position detection mechanism, a flexible printed board with detection circuits for disconnection and short circuits, and a disassembly detection mechanism to execute tamper-resistant processing when unauthorized attempts are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch panel display is used for inputting secret information, then the ease of operation is improved, but the security against illegal acquisition is insufficient
Solution Approach 1:
The patent implements preliminary security measures by incorporating detection circuits that monitor the integrity of the flexible printed board and disassembly detection mechanisms that detect unauthorized opening attempts before secret information can be illegally accessed. These preventive measures are built into the display structure itself, ensuring security is maintained from the outset rather than added later.
Solution Approach 2:
The patent introduces an intermediary detection system between the touch panel and the secret information processing. The detection circuits and disassembly detection mechanisms act as intermediaries that monitor and control access to the internal components, preventing direct access to secret information while allowing normal operation of the touch panel.
2Reliability
If detection circuits and disassembly detection mechanisms are added to enhance security, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the detection circuits directly into the flexible printed board structure, combining the functionality of the display, touch panel, and security detection into a single integrated component. The disassembly detection mechanism is also integrated into the display assembly, reducing the need for separate security devices and minimizing overall system complexity.
Solution Approach 2:
The flexible printed board serves multiple functions: it acts as both the electrical connection medium for the touch panel and as a substrate for the detection circuits that monitor its own integrity. The display assembly itself serves as both the user interface and the platform for disassembly detection, achieving multi-functionality that reduces device complexity.
Data Source
AI summary
An information processing device includes a display with a touch panel to which secret information is inputted. The display includes a touch position detection mechanism which detects a touched position of the touch panel, and at least one of a flexible printed board formed with a detection circuit for detecting at least one of its own disconnection and short circuit and a signal circuit for transmitting an output signal of the touch position detection mechanism, and a disassembly detection mechanism for detecting that the display is disassembled. A control part which controls the display executes a predetermined tamper-resistant processing when the control part detects at least one of disconnection and a short circuit of the detection circuit or, the control part executes the tamper-resistant processing when the control part detects that the display is disassembled.