Quantum-classical hybrid security systems and methods

Embodiments are disclosed for providing quantum-classical hybrid security. An example system includes a hybrid quantum-classical transmitter device. The hybrid quantum-classical transmitter device includes a classical transmitter and a quantum transmitter. The classical transmitter is configured to generate data based on a cryptography technique. The classical transmitter is also configured to generate a classical bitstream representation of the data, where the classical bitstream is configured for transmission via an optical communication channel. The quantum transmitter is configured to embed one or more qubits into the classical bitstream to generate a hybrid quantum-classical bitstream for transmission via the optical communication channel.