Apparatus and method for path superposition based quantum secure direct communications

摘要

The present invention provides a device and a method for quantum security direction communication using a path superposition, which have more improved security. The device for quantum security direction communication using a path superposition comprises: a receiving terminal transmitting a single photon through any one channel among a first quantum channel, a second quantum channel or a superposition channel which is a quantum superposition of the first and second quantum channels; and a transmitting terminal receiving the single photon from the receiving terminal, and encrypting the single photon to transmit the single photon to the receiving terminal. The receiving terminal provides a decryptor so as to receive and decode the single photon encrypted from the transmitting terminal.