Air Gap Network Isolation with Authenticated Out-of-Band Signals
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Solution Overview
Problem
Existing methods for securing sensitive data, such as passwords and cryptocurrencies, are vulnerable to hacking and unauthorized access due to continuous online presence of computers, and traditional cloud storage is susceptible to unauthorized access and man-in-the-middle attacks.
Innovation Solution
A network isolation device using an air gap mechanism controlled by an out-of-band signal receiver, which includes a hardware signal filter and authentication process to remotely manage network connectivity, ensuring that memory resources are offline by default and accessible only upon authorized access through a non-IP communication channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sensitive data is stored online or in the cloud for easy access, then accessibility and convenience are improved, but security and vulnerability to hacking attacks worsen
Solution Approach 1:
The system divides the storage architecture into two separate segments: an offline air-gapped storage device for secure data retention and an online interface device for user interaction. The offline device contains the actual sensitive data (cryptocurrencies, passwords) and remains physically isolated from networks, while the online device provides web-based access without holding the actual sensitive data, thus resolving the contradiction between accessibility and security.
Solution Approach 2:
The patent introduces an intermediary online interface device that acts as a mediator between users and the offline storage system. This intermediary handles all network communications, user authentication, and data display, while the actual sensitive data remains isolated in the offline device. The intermediary transfers information between the online and offline worlds without exposing the sensitive data to network threats.
2Productivity
If computers remain continuously online for data access, then productivity and speed are improved, but exposure to malware and unauthorized access increases
Solution Approach 1:
The system implements periodic connection to the offline storage device through automated backup processes. The online interface device periodically synchronizes with the offline device to update data displays and retrieve information, allowing the offline device to remain disconnected for extended periods while maintaining data accessibility when needed.
Solution Approach 2:
The offline storage device is prepared in advance with all necessary sensitive data and remains pre-configured and ready. When data access is needed, the offline device can be quickly connected to the online interface without requiring complex setup or configuration, thus maintaining productivity while minimizing exposure time to network threats.
3Reliability
If air gap isolation is implemented for security, then protection from network threats is improved, but device complexity and operational difficulty worsen
Solution Approach 1:
The offline storage device is designed as a universal platform that can store multiple types of sensitive data (cryptocurrencies, passwords, personal information) using standardized formats. The online interface device provides a unified web-based access method that works across different devices and platforms, reducing operational complexity despite the physical air gap isolation.
Solution Approach 2:
The system creates informational copies rather than physical duplications. The online interface device maintains copies of data metadata and display information, while the actual sensitive data remains in the offline device. This copying approach allows complex data structures to be managed online without increasing the physical complexity of the isolated offline device.
4Reliability
If offline storage is used to prevent unauthorized access, then security is improved, but ease of data retrieval and management worsens
Solution Approach 1:
The online interface device provides real-time feedback to users about the status of the offline storage system, including data integrity checks, connection status, and security events. This feedback mechanism allows users to monitor and manage their offline-stored data remotely, improving ease of operation without compromising the security of the air-gapped offline device.
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
Prevents unauthorized access by keeping sensitive data offline until needed, enhancing security by isolating internal networks from external threats and ensuring secure, on-demand connectivity.
Implementation Method 1
A network isolation device includes an optocoupler that opens or closes an air gap between a first network interface that faces an internal network and a second network interface that faces external networks
Data Source
AI summary
A network isolation device includes an internal network interface to connect the network isolation device to an internal network and an external network interface to connect the network isolation device to an external network. The network isolation device further includes an airgap device that operates to (i) close an air gap to connect the internal network to the external network, (ii) open the air gap to disconnect the internal network from the external network. The device further includes a signal receiver that receives a signal from a signal source, and based on the signal, performs an authentication process to determine whether the signal or the signal source are authorized. In response to determining that the signal or the signal source is authorized, the receiver operates the airgap device to close the air gap and connect the internal network to the external network.