Systems, apparatuses, methods, and computer program products are disclosed for session authentication. An example method includes determining, by decoding circuitry, a set of optical path lengths to use for measurement. The example method further includes receiving, by the decoding circuitry, a set of time-bin qubits. The example method further includes measuring, by the decoding circuitry and based on the determined set of optical path lengths, the set of time-bin qubits to generate a measured set of time-bin qubits. The example method further includes generating, by session authentication circuitry, a session key based on the measured set of time-bin qubits.