Capacitive Pad Intrusion Detection via Extracted Security Element
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Solution Overview
Problem
Existing payment terminals face challenges in detecting opening or intrusion attempts, especially with compact keypads and externally mounted capacitive pads, where traditional security methods are inefficient due to space constraints and aesthetic considerations, leading to potential detachment of security components.
Innovation Solution
A flexible security element with electrical tracks is affixed beneath the capacitive pad, allowing it to exert force on the upper cover without detaching the pad, using a cut-detection module to identify any attempts to open the terminal by cutting the electrical track.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If false keys with plastic extensions are used to detect opening, then security detection is improved, but device size increases due to space requirements for extensions
Solution Approach 1:
The invention extracts the detection function from the capacitive pad itself and places it in a separate security element mounted on the mother board. This allows the capacitive pad to be mounted externally for aesthetic purposes while the security element remains inside the housing, resolving the contradiction between external mounting requirements and internal security implementation.
Solution Approach 2:
The security element acts as an intermediary between the capacitive pad and the opening detection system. It provides the mechanical force exertion and electrical track for detection without requiring the capacitive pad to be internally mounted, thus enabling both external aesthetic mounting and reliable security detection.
2Shape
If capacitive pad is bonded from exterior of upper cover, then aesthetic appearance is improved, but security detection capability deteriorates
Solution Approach 1:
The invention segments the capacitive pad system into two independent parts: the capacitive pad itself for aesthetic external mounting, and a separate security element for internal security detection. This segmentation allows each component to fulfill its specific function without compromising the other.
Solution Approach 2:
The security detection function is extracted from the capacitive pad structure and implemented as a separate security element on the mother board. This enables the capacitive pad to be externally bonded for aesthetic purposes while the security element provides intrusion detection through its electrical track.
3Volume of moving object
If compact keypad design is implemented, then device size is reduced, but security element installation becomes difficult
Solution Approach 1:
The security element is extracted from the keypad structure and mounted independently on the mother board. This allows compact keypad design without requiring space for traditional plastic extensions, as the security element uses a different mounting approach via electrical tracks on the circuit board.
Data Source
AI summary
A data-entry device includes an upper cover to which a capacitive pad is affixed through the exterior. The capacitive pad has at least one flexible security element having at least one electrical track connected to a cut-detection module in the device. The shape and the mounting of the at least one security device is adapted to exert a force on the internal face of the upper cover.