One-Way Coupling Device for Feedback-Free Data Transmission
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Solution Overview
Problem
Current cross-domain security solutions fail to provide a simple and flexible method for feedback-free data transmission from high-security networks to low-security networks, often requiring complex protocol conversions and encryption management.
Innovation Solution
A one-way coupling device comprising a request apparatus, monitoring apparatus, and receiver apparatus, which establishes a separate communication connection for data transmission, ensuring unidirectional data flow by using different protocols for each network and employing a monitoring apparatus as a data copier to prevent feedback, while allowing flexible protocol usage and secure cryptographic methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data diodes are used to ensure unidirectional data communication, then feedback-free transmission is achieved, but device complexity increases
Solution Approach 1:
The system is divided into three separate functional apparatuses: a request apparatus that initiates data requests, a monitoring apparatus that passively monitors data transmissions, and a receiver apparatus that receives monitored data. This segmentation eliminates the need for complex data diodes while ensuring feedback-free transmission through physical separation of functions.
Solution Approach 2:
The monitoring apparatus acts as an intermediary between the request apparatus and receiver apparatus. It passively monitors data on the communication connection and transfers copies to the receiver apparatus without introducing feedback loops, thereby simplifying the overall system architecture while maintaining unidirectional data flow.
2Adaptability or versatility
If protocol conversion is implemented for bidirectional communication, then communication flexibility is improved, but data security is compromised
Solution Approach 1:
Instead of converting protocols to enable bidirectional communication, the system inverts the approach by using separate protocols for separate functions: the request apparatus uses protocols suitable for initiating requests, while the monitoring apparatus uses different protocols for passive data collection. This eliminates the security risks of protocol conversion while maintaining communication flexibility.
3Reliability
If encryption management is implemented for secure data transmission, then data security is improved, but ease of operation deteriorates
Solution Approach 1:
The monitoring apparatus performs passive monitoring and data copying automatically without requiring manual encryption management. The system self-manages security by physically separating the monitoring function from the data transmission path, eliminating the need for complex encryption key management while maintaining data security.
4Reliability
If a separate communication connection is established for data transmission, then data integrity is improved, but device complexity increases
Solution Approach 1:
The monitoring apparatus and receiver apparatus are combined in a way that the monitoring apparatus directly transfers monitored data to the receiver apparatus without requiring separate complex routing infrastructure. This merging approach maintains data integrity through physical separation while reducing overall device complexity compared to fully independent systems.
Data Source
AI summary
A one-way coupling device for the feedback-free transmission of data from the first network with high security requirements into a second network with low security requirements, containing a request unit, an eavesdropping unit and a receiving unit, wherein the request unit is formed so as to provide a first communication link within the first network to at least one device and, moreover, to request first data from the at least one device and then to transmit the first data via a second communication link on a separate line loop of the request unit, and the eavesdropping unit, which is formed so as to eavesdrop on data on the separate line loop and to transmit data to a receiving unit which is arranged in the second network. Also, a corresponding request unit, a corresponding method and a corresponding computer program product is also provided.