Card Reader Breakage Detection Circuit for Secure Data
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Solution Overview
Problem
Existing card readers are ineffective in preventing data acquisition when a criminal attempts to access data without detaching the card reader from the host apparatus, and they may incorrectly detect attachment due to inaccurate positioning, allowing potential data breaches.
Innovation Solution
A card reader design incorporating a data signal circuit pattern surrounded by a breakage detection circuit pattern on multiple printed circuit boards, including rigid and flexible boards, to detect disconnection or short-circuiting, ensuring secure data protection even if the card reader is not accurately attached to the host apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sheet switch or tamper switch is used to detect card reader detachment, then illegal detachment can be detected and data acquisition prevented, but the system cannot prevent data acquisition when the card reader is not accurately attached to the host apparatus
Solution Approach 1:
The patent divides the circuit board into multiple regions: a protected region containing the data signal circuit pattern and a breakage detection region containing the breakage detection circuit pattern. This segmentation allows independent detection of data signal integrity and physical attachment status, improving reliability while reducing false positives.
Solution Approach 2:
The breakage detection circuit pattern acts as an intermediary between the physical attachment state and the data security system. It provides an intermediate detection layer that verifies both accurate attachment and data signal integrity before allowing data access, thereby preventing false positive detections.
2Ease of operation
If the card reader is not accurately attached to the host apparatus, then data acquisition can still occur, but the security function is compromised
Solution Approach 1:
The breakage detection circuit pattern provides continuous feedback on the attachment state and data signal integrity. When the card reader is not accurately attached, the breakage detection circuit pattern detects this condition and triggers security responses, thereby maintaining security function while allowing operational flexibility in attachment.
Solution Approach 2:
The breakage detection circuit pattern performs preliminary detection of attachment accuracy and data signal integrity before data transmission begins. This preliminary action prevents insecure data acquisition attempts while maintaining ease of operation during normal accurate attachment.
3Reliability
If a breakage detection circuit pattern is added to detect disconnection or short-circuiting, then data security is improved, but device complexity increases
Solution Approach 1:
The patent merges the data signal circuit pattern and breakage detection circuit pattern into a single integrated circuit board structure. The protected region and breakage detection region are combined in one board, reducing overall device complexity while maintaining enhanced data security through the dual-function design.
Data Source
AI summary
A card reader for use with a card may include a data signal circuit pattern structured to transmit at least one of a data signal read from a card and a data signal to be recorded to the card; and a breakage detection circuit pattern structured to detect at least one of its own disconnection and its own short-circuit. The data signal circuit pattern is disposed within a protected region that is a region surrounded from all directions by the breakage detection circuit pattern.