Transfer Gateway Isolation Using Exclusive Memory Channels
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Solution Overview
Problem
Existing security components for digital data transfer, such as hardware firewalls, protocol-breaking gateways, and network diodes, fail to provide complete network partitioning and are vulnerable to illegitimate data transmission due to complexity, encryption masking, or reliance on network integrity.
Innovation Solution
A transfer device with four communication interfaces and a transfer controller that operates independently of the networks, using exclusive transmission channels to manage data through a transfer memory for verification and secure storage, ensuring no physical connection is established between networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hardware firewall is used for data filtering, then security inspection capability is improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The gateway device is segmented into distinct functional modules: a first interface for the first network, a second interface for the second network, and a controller that independently manages data transfers between them. This segmentation allows each component to have a specialized, simplified function while maintaining overall security inspection capability.
Solution Approach 2:
The controller acts as an intermediary between the two network interfaces, independently verifying the legitimacy of digital data transfers without requiring complex filtering rules. This intermediary approach simplifies the implementation by centralizing security logic in a dedicated component that mediates all transfers between networks.
2Reliability
If protocol-breaking gateway with double conversion is used, then attack prevention capability is improved, but data transmission completeness deteriorates
Solution Approach 1:
The gateway creates a verified copy of digital data transfers through independent legitimacy verification by the controller. Instead of breaking and reconstructing protocols, the system verifies the integrity and legitimacy of data transfers through this copying/verification mechanism, preserving complete data transmission while preventing attacks.
Solution Approach 2:
The system changes the verification parameter from protocol-based inspection to legitimacy-based verification. The controller independently verifies whether transfers are legitimate without being constrained by specific protocol requirements, allowing complete data transmission while maintaining attack prevention capability.
3Reliability
If network diode is used for unidirectional transfer, then security control is improved, but transfer window integrity vulnerability increases
Solution Approach 1:
The controller serves as an intermediary that independently verifies the legitimacy of digital data transfers between the two networks. This intermediary verification mechanism protects against transfer window corruption by validating transfers at the controller level, preventing corrupted data from affecting either network.
Solution Approach 2:
The system applies uniform legitimacy verification to all digital data transfers between the two networks through the controller. This homogeneous verification approach ensures consistent security control while protecting against corruption risks, regardless of the direction or type of transfer.
4Reliability
If existing security components are used to increase security level, then security protection is improved, but exchange capability deteriorates
Solution Approach 1:
The invention extracts the security verification function from the network protocols themselves and places it in an independent controller. This extraction allows the gateway to provide strong security protection through independent legitimacy verification while maintaining full exchange capability between networks, as the verification does not interfere with the actual data transfer protocols.
Data Source
AI summary
A transfer device for transferring digital data, in a communication system, between a first network and a second network. The device includes a first interface with the first network, a second interface with the second network, a third interface with a transfer controller for controlling the transfer of digital data through the transfer device, and a fourth interface arranged to be connected to at least one transfer memory. The transfer device is configured to activate successively, in a respectively exclusive manner: a first transmission channel through the first and fourth interface, a second transmission channel through the third and fourth interface, and a third transmission channel through the second and fourth interface.