Photon reversal is an odd property of subatomic particles discovered by the Kelosians. They found that two pairs of photons can be linked to each other in such a way that the difference between the protons of one pair can be controlled from the other pair. A photon communicator harnesses this by trapping one pair of photons within a magnetic field and measuring the two photons repeatedly. To send a message, the communicator breaks off measuring the photons and forces an interaction that causes the two photons to have either the same state or different states, depending on the type of message being sent. This interaction is much stronger than the influence of measurement, so the other party will sometimes recognize a message.