Secure Keypad Housing With Tamper Detection Conductors
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Solution Overview
Problem
Current secure keypad devices lack effective anti-tampering mechanisms to prevent unauthorized access and physical tampering, which compromises data security.
Innovation Solution
The implementation of anti-tampering electrical conductors and detection circuitry within the keypad device's housing and substrate, which are activated or deactivated based on the closure or opening of the device, preventing unauthorized electrical contact and triggering alarms or disablement when tampering is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anti-tampering electrical conductors are arranged between the top housing portion and the substrate, then unauthorized access to the substrate is prevented, but the device complexity increases
Solution Approach 1:
The patent employs a flexible substrate with integrated anti-tampering electrical conductors that can be disposed between the top housing portion and the substrate. This flexible film approach provides effective tamper protection while maintaining a relatively simple device structure, as the thin film can be easily integrated into the existing keypad assembly without adding significant complexity.
2Reliability
If the substrate is made flexible to accommodate anti-tampering conductors, then unauthorized electrical contact is prevented, but manufacturing precision requirements increase
Solution Approach 1:
The flexible substrate is designed as a thin film that can be manufactured with standard precision tolerances. The flexibility of the film allows it to conform to the housing structure while maintaining reliable electrical connections for the anti-tampering conductors, thereby reducing the stringency of manufacturing precision requirements.
3Reliability
If anti-tampering detection circuitry is integrated into the device, then tampering detection capability is enhanced, but the device complexity and energy consumption increase
Solution Approach 1:
The anti-tampering detection circuitry is integrated with the existing keypad circuit board, allowing the same circuit board to serve both data entry processing and tamper detection functions. This multi-functionality approach enhances security capabilities while minimizing the increase in device complexity, as no separate dedicated detection system is required.
Solution Approach 2:
The detection circuitry utilizes the existing electrical conductors and circuit board infrastructure of the keypad device to perform tamper detection, rather than requiring entirely separate detection components. The system essentially uses its own existing structure for dual purposes: data entry operation and security monitoring.
Data Source
AI summary
A data entry device including a housing including a top housing portion including key apertures, a plurality of data entry keys mounted in the housing to have data entry key depression travel paths in the housing, the plurality of data entry keys being associated with a substrate, which is disposed below the top housing portion and anti-tampering electrical conductors arranged between the top housing portion and the substrate thereby to prevent unauthorized access to the substrate.