Abstract: Systems, methods, and computer-readable storage media for secure communications, and more specifically to securing communications on previously air-gapped equipment using post-quantum encryption. A system can include: a first technology environment comprising at least one first technology component, the at least one first technology component comprising a first Post-Quantum Encryption (PQE) module; a second technology environment comprising at least one second technology component, the at least one second technology component comprising a second PQE module; a demilitarized zone (DMZ) environment having at least one DMZ processor; and a communications network, where the first technology environment, the second technology environment, and the DMZ environment are networked together across the communications network such that communications between the first technology environment and the second technology environment pass through the DMZ environment, the communications being encrypted using PQE.