One-Way Data Link for Continuous Network Synchronization
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Solution Overview
Problem
Conventional one-way data link systems for secure data transfer between low-side and high-side networks are limited by non-continuous data transfer, resulting in delays between data upload and access, as they only allow data import during scheduled operations, failing to provide real-time synchronization and continuous data transfer.
Innovation Solution
A data transfer system utilizing a one-way data link with interconnected data diodes between transmitter and receiver interfaces, enabling continuous unidirectional data transfer from a low-side network to a high-side network, with a synchronization mechanism that prioritizes newly added or modified data files for immediate transfer and verifies data integrity using hashing algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scheduled data importing operation is performed once a day during off-peak usage times, then network security is maintained and energy consumption is reduced, but data transfer delay increases and real-time synchronization is lost
Solution Approach 1:
The system uses periodic polling at predetermined intervals to check for new or modified data files, transforming the single daily batch import into repeated periodic checks. This maintains security by using automated polling rather than continuous connection, while reducing delay by checking more frequently than once daily.
Solution Approach 2:
The system establishes continuous data transfer capability through the one-way data link, allowing data to be transferred immediately when detected as new or modified. This creates a continuous synchronization process rather than intermittent batch transfers, eliminating the delay between data upload and accessibility while maintaining secure unidirectional transfer.
2Device complexity
If conventional batch import operation is used, then system complexity is reduced and energy consumption is minimized, but data synchronization precision deteriorates and real-time access is unavailable
Solution Approach 1:
The system employs automated polling that independently checks for new or modified data files without requiring manual intervention. The one-way data link automatically transfers detected changes, and the system self-verify data integrity through hashing algorithms. This maintains low complexity by avoiding manual operations while achieving precise real-time synchronization.
Solution Approach 2:
The system uses hashing algorithms to verify data integrity and confirm successful transfer. This feedback mechanism ensures synchronization precision by detecting and correcting any transfer issues, while maintaining simple operation through automated verification rather than complex manual checking procedures.
3Speed
If continuous data transfer is implemented, then data synchronization speed is improved and real-time access is enabled, but data link reliability requirements increase and security vulnerability may increase
Solution Approach 1:
The one-way data link acts as an intermediary that enables continuous data transfer while maintaining security. It allows data to flow continuously from the low-side network to the high-side network, achieving real-time transfer speed, while its unidirectional nature inherently prevents reverse data flow and maintains data link reliability and security.
Solution Approach 2:
The system converts the potential security risk of continuous data transfer into a benefit by using the one-way data link's unidirectional property. This design inherently prevents unauthorized data exfiltration from the secure network, turning what could be a security vulnerability into a security feature that enables continuous transfer while maintaining reliability.
4Ease of operation
If manual data import command is required, then operational control is improved and security is maintained, but productivity decreases and data transfer delay increases
Solution Approach 1:
The system performs automated polling at predetermined intervals to detect new or modified data files without requiring manual commands. This self-service operation maintains security through automated controlled access while dramatically improving productivity by eliminating the delay associated with manual import initiation.
Solution Approach 2:
The system performs preliminary automated checks for new or modified data files before transfer is needed. This preliminary action ensures data is ready for immediate transfer when detected, improving productivity by eliminating wait time while maintaining operational control through automated security protocols.
Data Source
AI summary
A data transfer system is configured to transfer data from a data transmitting site to a data receiving site. The data transfer system includes a low-side network, at least one high-side network, and a one-way data (OWD) link. The OWD link is configured to perform unidirectional data transfer from the low-side network to the at least one high-side network. The OWD link continuously synchronizes the low-side network with the at least one high-side network while continuously transferring data through the OWD link.