On-Demand I/O Composition Kernel for Secure Device Isolation
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Solution Overview
Problem
Existing I/O kernels are unable to provide secure, on-demand I/O channels for multiple types of devices simultaneously, leading to increased development costs and impracticality due to the need for multiple kernels and complex hardware interactions.
Innovation Solution
The introduction of an on-demand I/O composition kernel (IOCK) that enables the secure composition of different I/O kernels, allowing for the creation of separated I/O channels for multiple types of devices while maintaining compatibility with general commodity OSes, Apps, and hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple I/O kernels are developed to support different device types, then device type coverage is improved, but development cost and complexity increase significantly
Solution Approach 1:
The patent creates a universal I/O kernel framework that can handle multiple device types (USB, GPU, display, audio, etc.) through a single unified design. The kernel uses generic I/O separation mechanisms that work across different device categories, eliminating the need for separate specialized kernels for each device type while maintaining security assurance.
Solution Approach 2:
The patent segments the I/O separation functionality into modular components within the kernel, allowing different device types to be managed through standardized interfaces. This segmentation enables the kernel to handle diverse devices without requiring complete redesign for each device category, reducing development effort while maintaining security.
2Reliability
If I/O kernels provide exclusive control over hardware resources, then security assurance is improved, but hardware compatibility and versatility deteriorate
Solution Approach 1:
The patent implements dynamic I/O separation where the kernel can flexibly assign and reassign hardware resources to different applications on-demand. This dynamic approach allows the system to maintain security isolation when needed while enabling versatile hardware usage when applications require access, resolving the contradiction between exclusive control and compatibility.
Solution Approach 2:
The patent introduces an intermediary layer in the I/O stack that mediates between hardware resources and applications. This intermediary provides standardized access interfaces that maintain security isolation while enabling broad hardware compatibility, allowing different applications to access various devices through a common secure interface.
3Reliability
If I/O kernels are designed for specific device types, then security for that device type is improved, but the ability to support multiple device types deteriorates
Solution Approach 1:
The patent designs a universal I/O kernel that provides device-specific security mechanisms through a common framework. The kernel implements generic security primitives that can be applied to any device type while maintaining the security assurance needed for each specific device category, eliminating the need for separate security implementations for each device type.
Data Source
AI summary
Disclosed herein is a system and method to provide secured I/O channels for multiple types of I/O devices to isolated applications, on-demand. The invention enables composition of different I/O kernels and, as such, eliminates developer effort required to re-implement and re-verify new I/O kernels to protect multiple types of I/O devices.