Display Driver IC Security via Pixel Modulation and Segmentation
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Solution Overview
Problem
Existing security measures for mobile payment and mobile banking applications are inadequate in protecting user unique information on the hardware plane, as image data from the graphic random access memory in display driver integrated circuits can be vulnerable to unauthorized access.
Innovation Solution
An electronic device with a display driver integrated circuit (DDI) that includes a graphic random access memory (GRAM) for storing images, an image merging module for merging partial images with control information, and a display timing controller to generate signals for the display, along with a processor that modulates pixel values in image data to enhance security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image data is stored in GRAM for display, then display functionality is enabled, but sensitive information becomes vulnerable to unauthorized access
Solution Approach 1:
The image data is divided into multiple partial images stored in different memory locations within the DDI. The image merging module reconstructs the complete image only when all partial images are correctly assembled, preventing unauthorized access to meaningful information from individual memory locations.
Solution Approach 2:
An image merging module is introduced as an intermediary component between the GRAM and the display output. This module acts as a security gate that combines multiple encrypted partial images into the final displayable image, ensuring that captured intermediate data remains unintelligible.
2Reliability
If encryption is applied to image data, then security is improved, but image processing complexity increases
Solution Approach 1:
Multiple encryption techniques are combined within the DDI architecture: pixel value modulation, partial image segmentation, and merging module encryption work together in sequence. This layered approach provides comprehensive security while distributing the computational complexity across multiple specialized components rather than requiring a single complex encryption system.
Data Source
AI summary
An electronic device is provided. The electronic device includes a display, a processor, and a display driver integrated circuit (IC) configured to drive the display.