Optical transmission device and receiving device for yuen encryption, optical transmission method and receiving method for yuen encryption, and encrypted communication system

摘要: A configuration method of an optical signal, encryption device, and system makes it possible for a legitimate communicating party to ensure information-theoretic security against known plain text attack communicate long-distance. By adding transmission information data sequence randomization device the Yuen encrypted communications according present information, which divides into blocks, appends numbers thereto, randomly switches blocks with digitized signal output electrical noise generator, inputs same generator conventional transmitter, relation between (plain text) is outputted from transmitter randomized, allowing forcibly making even circumstance wherein known-plain would be cipher-text-only attack, realizing attack.