Hardware Data Diode with Opto-Isolation for Unidirectional Transfer
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Solution Overview
Problem
Conventional security systems, including firewalls and software-based solutions, are inadequate for providing reliable one-way data transfer to protect critical infrastructure from cyber threats and physical asset attacks, as they can be misconfigured or compromised, allowing reverse data flow and enabling malicious activities.
Innovation Solution
A compact data diode device with a one-way data bridge and network tap, utilizing photocouplers or other opto-isolator components to enforce physical one-way communication, coupled with processing elements that manage and convert protocols to ensure secure, unidirectional data transfer, even in environments requiring two-way communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If software-based one-way data transfer systems are used, then data transfer control is implemented, but the systems are difficult to validate and verify, and may be subject to misconfiguration that allows data leakage or intrusions
Solution Approach 1:
The patent replaces software-based one-way data transfer control with a hardware-based opto-isolator system. The opto-isolator uses optical signals to transmit data from the first circuit to the second circuit while providing galvanic isolation, making it physically impossible for data to flow in reverse. This hardware enforcement eliminates the validation and verification difficulties associated with software-based systems.
2Object-affected harmful factors
If conventional firewalls and security systems are used, then network protection is provided, but they can be misconfigured or compromised, allowing reverse data flow
Solution Approach 1:
The patent replaces conventional software-based firewalls and security systems with a hardware-based opto-isolator that provides physical one-way data transfer. The galvanic isolation and optical transmission mechanism make it impossible for malware or attackers to compromise the system or establish reverse data flow, thereby significantly improving protection reliability against cyber threats.
Solution Approach 2:
The opto-isolator is designed with inherent one-way data flow capability from the outset, preventing reverse data flow before it can occur. The galvanic isolation and optical transmission architecture proactively block any possibility of malware propagation or attacker communication back to the protected network, rather than relying on software-based detection and response.
3Reliability
If opto-isolator components are used to enforce one-way communication, then physical one-way data transfer is achieved, but the system may have limited adaptability to two-way communication protocols
Solution Approach 1:
The patent introduces protocol translation functionality as an intermediary layer between the opto-isolator's one-way optical transmission and the application layer's two-way communication requirements. The first processing element receives and translates incoming optical data from the opto-isolator, while the second processing element translates outgoing data for transmission through the opto-isolator, thereby enabling protocol compatibility without compromising the physical one-way enforcement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a hardware-enforced, reliable one-way data transfer mechanism that prevents reverse data flow, enhancing the security of critical infrastructure by ensuring secure monitoring and isolation of protected networks from intrusions, while being adaptable to various communication protocols without extensive configuration.
Implementation Method 1
utilizing photocouplers or other opto-isolator components to enforce physical one-way communication
Data Source
AI summary
A data diode provides a flexible device for collecting data from a data source and transmitting the data to a data destination using one-way data transmission. On-board processing elements allow the data diode to identify automatically the type of connectivity provided to the data diode and configure the data diode to handle the identified type of connectivity. A network tap allows monitoring network traffic on the source side of the data diode.