Infrared Input Shielding for ATM PIN Capture Prevention
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Solution Overview
Problem
Existing transaction devices, such as ATMs, POS devices, and kiosks, face challenges in preventing image or video capture of sensitive input data, like PINs, from nearby image or video capture devices.
Innovation Solution
The implementation of a device with an input element, associated infrared elements, and a sensor that calculates position and intensity adjustments for the infrared elements based on user and environmental data. These adjustments enable the infrared elements to reflect light away from the input element, thereby preventing image or video capture of the input data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional input elements are used without additional protective measures, then the device structure remains simple, but the input data is vulnerable to image or video capture by nearby devices
Solution Approach 1:
The patent introduces an intermediary substance (e.g., liquid crystal material or birefringent material) positioned between the input element and potential capture devices. This intermediary modifies the optical properties of light reflecting from the input element, making it invisible or distorted to external cameras while remaining visible to the user. The intermediary acts as a mediator that selectively controls information transmission based on the observer's position or viewing angle.
Solution Approach 2:
The patent applies different optical properties to different regions or viewing angles. The protective material is configured to provide protection specifically in directions where capture devices might be positioned, while maintaining normal visibility for the user. This localized application of optical manipulation ensures data protection only where needed, without affecting the overall usability of the input element.
2Reliability
If fixed protective measures are implemented, then data protection is provided, but the protection cannot adapt to different viewing angles or lighting conditions
Solution Approach 1:
The patent employs dynamic materials or mechanisms that can change their optical properties in response to environmental conditions or user interaction. For example, the protective layer may change its refractive index, transparency, or reflective properties based on viewing angle, lighting conditions, or applied voltage. This dynamic behavior allows the protection mechanism to adapt to different scenarios, maintaining effectiveness across varying conditions.
Solution Approach 2:
The system incorporates sensors that detect the presence of capture devices, lighting conditions, or user position, and automatically adjusts the protective measures accordingly. The feedback loop enables the protective mechanism to respond in real-time to changing conditions, enhancing adaptability. For instance, the system may activate or adjust the optical properties of the protective material when a capture device is detected in the vicinity.
3Reliability
If comprehensive protective measures are applied to all input elements, then data protection is maximized, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent divides the protective solution into modular components that can be selectively applied to different input elements based on their sensitivity or risk level. Rather than protecting every input element uniformly, the system identifies high-risk areas (e.g., PIN entry fields) and applies protective measures specifically to those regions. This segmentation reduces material costs and simplifies manufacturing while maintaining protection where it is most needed.
Solution Approach 2:
The patent employs cost-effective protective materials or layers that can be easily integrated into existing devices without requiring expensive specialized components. The protective mechanism uses readily available materials (such as standard liquid crystal displays or birefringent films) that can be manufactured at low cost and integrated through simple processes, making the solution economically viable for widespread deployment.
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
Effectively prevents image or video capture of sensitive input data by using dynamically adjusted infrared elements to reflect light away from the input element, thereby protecting user data from unauthorized capture.
Implementation Method 1
enable the infrared element, when illuminated, to reflect light away from the input element
Data Source
AI summary
A device receives position information from a sensor of the device, wherein the position information indicates a position of a user of the device and a position of a person proximate to the user. The device receives lighting information from the sensor, wherein the lighting information indicates lighting conditions around the device and the user. The device calculates a position adjustment for an infrared element of the device based on the position information and the lighting information, and calculates an intensity adjustment for the infrared element based on the position information and the lighting information. The device receives, via an input element of the device, input data provided by the user, and implements the position adjustment and the intensity adjustment to enable the infrared element, when illuminated, to reflect light away from the input element and to prevent image or video capture of the input data.