Protocol Splitter for Unidirectional Network Security

The patent segments bi-directional communication into separate unidirectional channels: one channel for transmitting commands from the protected facility to the external network, and another channel for transmitting responses and status information from the external network to the protected facility. This segmentation allows the system to maintain hardware-enforced unidirectional security while enabling complete bi-directional communication exchanges.

The patent introduces an intermediary message buffer or queue mechanism that receives commands from the protected facility, stores them temporarily, and forwards them to the external network. Similarly, responses from the external network are buffered and delivered to the protected facility. This intermediary structure enables communication between unidirectional channels without requiring direct bi-directional connectivity.

Instead of allowing full bi-directional communication and then trying to filter malicious traffic, the patent inverts the approach by implementing hardware-enforced unidirectional channels that physically prevent malware and attackers from initiating communication into the protected facility. The architecture ensures that only pre-approved commands can exit the protected facility, and only responses to those commands can return, eliminating the attack vector entirely.

The patent applies preliminary anti-action by blocking potential attack vectors before they can be exploited. Hardware-enforced unidirectional channels prevent malware from propagating into the protected facility by physically blocking incoming communication initiatives. The system proactively prevents harmful factors rather than reacting to them after detection.

The patent implements a dynamic command approval mechanism where the protected facility can selectively approve or reject commands before they are transmitted through the unidirectional channel. The system dynamically adapts to different operational requirements by allowing legitimate database update commands to pass through while blocking potentially malicious traffic. This dynamic control maintains both security and productivity.

The patent employs preliminary action by pre-approving or whitelisting legitimate command types and protocols before they are transmitted. The system establishes predetermined rules for what commands are allowed to exit the protected facility through unidirectional channels, ensuring that legitimate database updates and control commands can proceed without blocking while maintaining security against unauthorized communication.