1. A system for distribution of private information, the system comprising: a sending unit configured to encode at least one bit onto at least two photons, the at least two photons comprising a first photon and a second photon, the at least two photons being entangled together, the at least one bit being encoded in at least one of: a polarization of at least one of the first photon and the second photon, and a time delay between a propagation of the first photon and the second photon; and a receiving unit configured to detect the at least one bit on the at least two photons transmitted from the sending unit.