Free-Space Optical Interconnections with Shutter Isolation
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Solution Overview
Problem
Current network security measures, such as air gaps, often rely on non-literal isolation methods that are not entirely effective in preventing data leakage between secure and unsecure computer networks, particularly due to the limitations of conventional copper-based cables in high-speed data transmission and the risk of electromagnetic interference.
Innovation Solution
The implementation of a secure computer network architecture utilizing Free-Space Optical Interconnections (FSOI) with a controllable, interlocked shutter system for bidirectional and unidirectional optical data transfer, creating a physical air-gapped isolation between processor components and network communications, ensuring secure data transfer and storage while preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional copper-based cables are used for data transmission, then electrical connectivity is established, but electromagnetic interference and security vulnerabilities increase
Solution Approach 1:
The patent replaces electrical signal transmission through copper cables with optical signal transmission through free-space optical channels. This substitution eliminates electromagnetic interference inherent in copper-based systems while maintaining high-speed data transmission capabilities through photonic communication between processor components and network interfaces.
2Reliability
If literal air gap isolation is implemented between secure and unsecure networks, then security is enhanced, but data transfer capability is reduced
Solution Approach 1:
The patent introduces free-space optical communication as an intermediary mechanism that bridges secure and unsecure networks while maintaining literal air gap isolation. Optical signals transmit data through physical space without electrical connectivity, enabling secure data transfer while preserving network isolation and preventing traditional electromagnetic-based attacks.
Solution Approach 2:
The patent transitions data transmission from the electrical domain to the optical domain, using light propagation through free space as a new dimension for communication. This dimensional change allows data to cross network boundaries without establishing electrical connections, thereby maintaining security isolation while enabling data transfer.
3Reliability
If optical encoding is applied to free-space communication links, then security is improved, but system complexity increases
Solution Approach 1:
The patent employs orbital angular momentum (OAM) of light as an additional encoding parameter for data transmission. By utilizing the spatial structure and angular momentum properties of optical waves, the system embeds security features directly in the physical characteristics of the light itself, creating inherently secure communication that is difficult to intercept or spoof without significantly increasing hardware complexity.
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
This solution enhances network security by physically isolating vulnerable components, preventing data exfiltration and unauthorized access, and maintaining data integrity through increased obfuscation and secure data transfer, even in high-capacity and high-speed environments.
Implementation Method 1
a first vertical-cavity surface-emitting laser (VCSEL) positioned on a first circuit board and configured to emit coherent light
Implementation Method 2
a first photodetector positioned on a second circuit board and configured to detect coherent light
Data Source
AI summary
An apparatus and method for computer network security based on Free-Space Optical Interconnections (FSOI) for board-to-board information transmission. The addition of a controllable, interlocked shutter system creates air-gapped isolation of the boards, allowing for increased obfuscation, and enhanced security.