Systems and methods for secure communication between computing devices over an unsecured network

A secure communication system for securing communication between a plurality of network computing devices over an unsecured network, the system comprising:

• a plurality of communication security devices, the plurality of communication security devices including:
• (i) a first communication security device in secure communication with a first network computing device of the plurality of network computing devices, and (ii) a second communication security device in secure communication with a second network computing device of the plurality of network computing devices,
• wherein the system performs operations comprising:
• establishes a list of authorized communication devices that specifies one or more computing devices with which each of the plurality of network computing devices are authorized to communicate;
• receives, at the first communication security device, a communication packet from the first network computing device, the communication packet including first destination information that specifies that the communication packet is intended to be delivered to the second network computing device;
• determines, at the first communication security device and based on the destination information and the list of authorized communication devices, whether the first network computing device is authorized to communicate with the second network computing device;
• when the first network computing device is authorized to communicate with the second network computing device:
• encapsulates, at the first communication security device, the communication packet to obtain an encapsulated communication packet, the encapsulated communication packet comprising:
• (i) the communication packet, and (ii) second destination information that specifies that the encapsulated communication packet is intended to be delivered to the second communication security device in order for the communication packet to be delivered to the second network computing device,
• transmits, from the first communication security device and to the second communication security device over the unsecured network, the encapsulated communication packet,
• de-encapsulates, at the second communication security device, the encapsulated communication packet to obtain the communication packet,
• determine, at the second communication security device and based on the destination information and the list of authorized communication devices, whether the second network computing device is authorized to communicate with the first network computing device, and
• when the second network computing device is authorized to communicate with the first network computing device, transmits, from the second communication security device, the communication packet to the second network computing device.