Payment Terminal Cover Structure for Secure Back-Lit Zones
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Solution Overview
Problem
Existing electronic payment terminals face challenges in achieving optimal ergonomics and physical security through back-lighting, as current solutions either degrade ergonomics or leave vulnerabilities that can be exploited in 'overlay attacks.
Innovation Solution
A cover comprising two layers, an opaque lower layer with apertures for back-lighting and a translucent upper layer that covers these apertures, ensuring light passage while providing a physical barrier, manufactured through overmolding or bi-injection to prevent separation and enhance security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cover is made opaque to protect the interior, then security is improved, but back-lighting zones cannot be illuminated
Solution Approach 1:
The cover is divided into two functional layers: an opaque lower layer for security and a translucent upper layer for back-lighting. This segmentation allows each layer to fulfill its specific function without compromising the other.
Solution Approach 2:
The cover uses a composite structure combining opaque and translucent materials in layers. The opaque lower layer (e.g., polycarbonate) provides security while the translucent upper layer (e.g., thermoplastic polyurethane) enables light transmission for back-lighting zones.
2Illumination intensity
If apertures are made in the cover for back-lighting, then illumination is improved, but physical security is degraded
Solution Approach 1:
The solution moves from a single-layer cover to a multi-layer structure, adding a dimensional aspect to the cover design. The apertures in the lower layer are covered by the upper layer, creating a three-dimensional structure that maintains security while enabling back-lighting.
Solution Approach 2:
The translucent upper layer acts as an intermediary between the opaque lower layer with apertures and the external environment. It allows light to pass through while providing a continuous physical barrier that prevents overlay attacks.
3Object-affected harmful factors
If the cover is made secure against attacks, then physical integrity is improved, but ergonomics are degraded
Solution Approach 1:
The upper layer is selectively applied only to the back-lighting zones rather than the entire cover. This local quality approach maintains security where needed while preserving ergonomic qualities in other areas of the terminal.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution maintains ergonomic and secure back-lighting zones, making it difficult for overlay attacks and ensuring the physical integrity of the terminal without degrading its appearance or feel.
Implementation Method 1
the upper layer is translucent and covers the at least one aperture in the lower layer
Implementation Method 2
the lower layer is opaque or semi-opaque and has at least one aperture facing the at least one zone to be back-lit
Data Source
AI summary
A cover for an electronic payment terminal having at least one zone to be back-lit. The cover includes at least one part having at least one lower layer and one upper layer assembled during the manufacture of the cover, the lower layer being opaque or semi-opaque and having at least one aperture facing the at least one zone to be back-lit when the cover is mounted on the electronic payment terminal. The upper layer is translucent and covers the at least one aperture in the lower layer.