Device Authentication via Display Pixel Irregularities
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Solution Overview
Problem
The challenge lies in uniquely identifying individual devices within large populations of homogeneous devices, such as smartphones and tablets, where the reduced variability and integrations of components make traditional digital fingerprinting methods less effective.
Innovation Solution
A device authentication system that utilizes data representing pixel irregularities of a device's display, including dead, hot, and stuck pixels, to create a unique mapping that distinguishes devices, even when other attributes are insufficient for identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional digital fingerprinting methods are used to identify devices, then device identification is effective for devices with diverse and replaceable components, but identification accuracy deteriorates for homogeneous devices with integrated components
Solution Approach 1:
The patent extracts and utilizes display pixel irregularities (dead pixels, hot pixels, stuck pixels) as a unique identifier for device fingerprinting. By focusing on these specific physical characteristics of the display component, the system achieves unique device identification even among homogeneous devices with integrated components, resolving the contradiction between traditional fingerprinting effectiveness and applicability to modern homogeneous devices.
2Measurement precision
If display pixel irregularities are used for device identification, then unique device identification is achieved, but additional authentication steps are required
Solution Approach 1:
The patent implements self-service by having the device automatically test and report its own display pixel irregularities during the authentication process. The device autonomously identifies its unique pixel characteristics (dead, hot, stuck pixels) and transmits this information to the authentication server, eliminating the need for manual intervention or complex external testing equipment, thus reducing overall system complexity while maintaining unique identification capability.
Data Source
AI summary
A device authentication server authenticates a remotely located device using data representing pixel irregularities of a display of the device. Since each display will deteriorate in a unique and randomized way, a unique mapping of pixel irregularities of a display of a device will be unique. By combining unique map of pixel irregularities of a display of the remotely located device, the device can be distinguished from similar devices when other attributes alone are insufficient to uniquely identify the device.