Isolation Kernel and Gateway for Small Satellite Cybersecurity
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Solution Overview
Problem
Small satellite systems are vulnerable to cyber-attacks due to hardware and software vulnerabilities, including maliciously modified components, false-data-injection attacks, and unsecure code, which compromise mission integrity and lack effective cyber-security measures.
Innovation Solution
An unmanned autonomous device with an isolation kernel and a secure gateway system that isolates subsystems, routes data through dedicated drivers, and verifies it based on predefined routes, formats, and authorized content, using a contract-based command arbitrator and guardian to ensure secure communication between subsystems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If subsystems are isolated with dedicated drivers and gateway routing, then security against cyber-attacks is improved, but device complexity increases
Solution Approach 1:
The system is divided into isolated subsystems (sensor subsystem, actuator subsystem, command subsystem, data handling subsystem) with dedicated drivers for each. The isolation kernel creates separate address spaces and privilege levels for each subsystem, preventing lateral movement of cyber-attacks while maintaining functional independence. This segmentation directly addresses the security vulnerability in monolithic satellite systems.
Solution Approach 2:
A gateway component acts as an intermediary between subsystems, enforcing predefined routing rules and filtering data traffic. The gateway validates commands and data packets before allowing communication between isolated subsystems, providing security enforcement without requiring direct subsystem interconnection. This mediator approach maintains security while enabling necessary system-wide communication.
2Object-affected harmful factors
If data routing is controlled through gateway with predefined routes, then attack profile is reduced, but data communication efficiency decreases
Solution Approach 1:
Valid routing paths and communication permissions are pre-established during system configuration and initialization. The gateway is pre-loaded with a routing table defining allowed communication paths between subsystems. During operation, the gateway only needs to check against these pre-validates routes rather than performing complex security analysis for each data packet, reducing overhead while maintaining security.
Solution Approach 2:
Each subsystem is assigned specific communication permissions and routing rules tailored to its functional requirements. Critical subsystems may have more restrictive routing while less sensitive subsystems allow broader communication. This localized security approach optimizes communication efficiency for each subsystem's specific needs while maintaining overall system security.
Data Source
AI summary
An unmanned autonomous device includes an isolation kernel having plurality of drivers respectively dedicated to a plurality of subsystems. The drivers are configured to facilitate communication between the subsystems. A gateway in the unmanned autonomous device is configured to control routing of data between the subsystems via the drivers respectively dedicated to the subsystems, such that data is only allowed to be passed between the subsystems along predefined routes.