Data Diode with Automatic Protocol Detection for Secure One-Way Transfer
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Solution Overview
Problem
Conventional firewall and software systems are inadequate for providing reliable one-way data transfer, making them vulnerable to data leakage and intrusions in high-security environments, such as industrial facilities and IoT devices, which are increasingly targeted by malicious actors.
Innovation Solution
A compact data diode device with processing elements and firmware that automatically detect communication protocols and configure one-way data bridges using optocouplers or other isolation methods to ensure unidirectional data flow, preventing reverse data flow and allowing operation across multiple protocols without manual configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional firewall and software systems are used for data transfer control, then ease of operation is maintained, but reliability of one-way data transfer deteriorates due to vulnerability to data leakage and intrusions
Solution Approach 1:
The patent introduces a data diode as an intermediary device that physically enforces one-way data transfer between networks. This hardware mediator uses optical isolation (optocouplers) to create an unidirectional communication path, eliminating the need for complex software-based security controls while ensuring reliable prevention of reverse data flow and intrusions.
Solution Approach 2:
The patent replaces software-based security systems with a hardware-based optical isolation mechanism. By using optocouplers to convert electrical signals to optical signals and back, the system achieves physical enforcement of one-way data transfer, substituting mechanical/optical components for vulnerable software firewall configurations.
2Reliability
If data diode with optocoupler is used to enforce one-way data transfer, then reliability of security is improved, but device complexity increases due to additional components required
Solution Approach 1:
The patent designs the data diode with multi-functional capabilities to reduce overall system complexity. The device can operate with different communication protocols (serial, parallel, USB) and support various data formats, allowing a single hardware platform to handle multiple security scenarios without requiring separate specialized components for each protocol.
3Reliability
If traditional data diodes are used for critical infrastructure protection, then security against malware intrusion is improved, but ease of operation deteriorates due to requirement for customization by skilled teams
Solution Approach 1:
The patent implements self-service capabilities in the data diode through automatic protocol detection and configuration. The device autonomously identifies communication protocols and configures itself without requiring manual intervention by skilled technicians, while maintaining hardware-enforced security against malware intrusion.
Solution Approach 2:
The patent incorporates pre-configured support for multiple communication protocols and data formats within the data diode. This preliminary preparation of various protocol handlers and configuration options allows the device to be deployed immediately with plug-and-play operation, eliminating the need for post-deployment customization by skilled implementation teams.
4Reliability
If optocoupler is used for optical isolation in data diode, then reliability of one-way transfer is improved, but loss of information increases due to protocol conversion requirements
Solution Approach 1:
The patent uses optical copying through optocouplers to transfer data from the electrical domain to the optical domain and back. This copying mechanism preserves the original data integrity while enforcing physical one-way transfer, as the optical signal is a faithful representation of the electrical signal without introducing information loss.
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 robust, hardware-enforced one-way data transfer, enhancing security by physically preventing data leakage from monitored resources to untrusted networks, thereby protecting critical infrastructure from cyber threats and physical asset attacks.
Implementation Method 1
An opto-isolator (also called an optocoupler) uses a optical emitter such as an LED that generates light responsive to electrical signals
Implementation Method 2
an optical sensor such as a phototransistor receives the light and converts the light into electrical signals
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. Either or both of the inbound and outbound side of the data diode may comprise one or both of wired and wireless communication interfaces.