IC Card Connector Board Tamper Detection Through Protection Openings
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Solution Overview
Problem
Existing information processing devices with an opening for attaching and detaching IC cards are vulnerable to illegal data acquisition due to potential disconnection or short-circuiting of breakage detection circuits when a hole is drilled through the protection board.
Innovation Solution
The device incorporates a control board with a data signal circuit, a connector board with a second breakage detection circuit, and a protection board with an opening, where the connector board is disposed on one side of the control board, and the second breakage detection circuit is formed on the face or internal layer of the connector board, overlapping with the opening, to detect and prevent illegal data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an opening part is formed in the protection board for IC card attachment, then IC card accessibility is improved, but security against illegal data acquisition deteriorates due to potential breakage detection circuit disconnection or short-circuiting
Solution Approach 1:
The protection board is segmented into multiple layers: a first protection board with the opening part for IC card access, and a second protection board without opening that covers the control board. This segmentation allows the opening to be provided only where needed while maintaining protection over critical areas.
Solution Approach 2:
The connector board serves as an intermediary element positioned between the first and second protection boards. It provides a breakage detection circuit that detects tampering attempts through the opening part, acting as a mediator that enables both access and security detection.
2Reliability
If a breakage detection circuit is formed on the protection board to detect tampering, then security is improved, but device complexity increases due to additional circuit components
Solution Approach 1:
The breakage detection circuit is merged with the connector board structure. The connector board integrates both the electrical connection function and the breakage detection function, eliminating the need for separate detection circuit components on the protection board itself.
Solution Approach 2:
The connector board performs multiple functions: it provides electrical connections between boards, serves as a structural support element, and contains the breakage detection circuit. This multi-functionality reduces overall device complexity while maintaining security capabilities.
3Volume of moving object
If the control board and connector board are overlapped in the thickness direction to reduce device size, then compactness is improved, but manufacturing precision requirements increase due to precise alignment needs
Solution Approach 1:
The control board and connector board are arranged in an overlapping configuration in the thickness direction, creating a nested-like structure. The connector board is positioned to overlap with the control board while maintaining proper electrical and structural connections, achieving compact integration.
Data Source
AI summary
An information processing device includes a control board, a connector board having a connector to which an IC card is attached, and a protection board formed with a breakage detection circuit. The connector board is formed with a second breakage detection circuit for detecting its own disconnection and short circuit. The connector is mounted on a face on one side of the connector board, the protection board is disposed on the one side with respect to the connector board, and the protection board has an opening part for attaching and detaching the IC card. The second breakage detection circuit is formed in at least one of a face on the opposite side of the connector board and an internal layer of the connector board, and the second breakage detection circuit is formed in at least an area of the connector board which is overlapped with the opening part.