MIL-STD-1553 Bus Security via Message Invalidation
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Solution Overview
Problem
MIL-STD-1553 data buses lack inherent security features, making them vulnerable to cyber threats such as compromised bus controllers and remote terminals, which can send malicious commands or data, leading to potential attacks and data breaches.
Innovation Solution
A bus security device with a memory, processing circuit, and transceiver is used to monitor the data bus for anomalies based on predefined security rules, injecting an invalidation signal to counteract threats by creating collisions with detected malicious messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIL-STD-1553 data bus is used for mission-critical systems, then reliability and robustness are improved, but security vulnerabilities increase due to lack of inherent security features
Solution Approach 1:
The patent introduces a security device as an intermediary component that monitors and validates messages on the MIL-STD-1553 bus. This device acts as a mediator between the existing bus infrastructure and the security requirements, adding security functionality without modifying the core MIL-STD-1553 protocol or existing terminals.
Solution Approach 2:
The security functionality is segmented into a separate, dedicated security device rather than being integrated into each terminal or the bus controller. This segmentation allows the security function to be added independently to the existing bus architecture, maintaining compatibility while addressing security vulnerabilities.
2Object-affected harmful factors
If security features are added to MIL-STD-1553 system, then security is improved, but device complexity increases
Solution Approach 1:
The security device is designed as a universal component that can be integrated with any MIL-STD-1553 bus configuration. It performs multiple functions including message monitoring, validation, and threat detection within a single device, reducing the need for multiple separate security components and thereby limiting complexity increase.
Solution Approach 2:
The security device autonomously monitors and validates messages on the bus without requiring active participation or configuration changes from existing terminals. It independently detects threats and invalidates malicious messages, providing security as a self-service function that does not complicate the operation of existing system components.
3Difficulty of detecting and measuring
If security monitoring is implemented on MIL-STD-1553 bus, then security detection capability is improved, but processing time increases
Solution Approach 1:
The security device pre-loads validation rules and security criteria into its memory before operation. This preliminary preparation allows the device to quickly compare incoming messages against stored security parameters without performing complex real-time analysis, thereby maintaining fast message processing while achieving thorough security monitoring.
Solution Approach 2:
The patent replaces complex real-time security analysis with a simplified validation mechanism that compares message parameters against pre-stored security rules. This substitution of complex processing with simpler comparison operations reduces the time required for security monitoring while maintaining effective threat detection.
Data Source
AI summary
Systems, devices, and methods for providing security on a MIL-STD-1553 serial data bus are described herein. Detected anomalies on the serial data bus that are determined to be threats are invalidated.