Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Secure Free-Space Optical Transmission of Y-00 Quantum Stream Cipher with 4096-Level Intensity Modulated Signals

Fumio Futami, Ken Tanizawa, Abdelmoula Bekkali, Hideo Fujita

Published Jan 1, 2020• 3 citations

Abstract

A secure free-space optical (FSO) system using a Y-00 quantum stream cipher is proposed and error-free (BER<10-9) secure FSO transmission over 30 m is achieved with a real-time 1.5-Gb/s Y-00 cipher with 4096 intensity levels.

DOI: 10.1364/cleopr.2020.c3f_4

Related papers

1,000-km Transmission of 1.5-Gb/s Y-00 Quantum Stream Cipher using 4096-level Intensity Modulation Signals

Fumio Futami, Ken Tanizawa, Kentaro Kato +1 more

A real-time 1.5-Gb/s Y-00 quantum stream cipher transmission for secure optical communication is experimentally demonstrated. An error-free (BER < 10-9) transmission of 4096-level intensity-modulation cipher signals is achieved in a dispersion-managed link over 1,000 km.

Conference on Lasers and Electro-OpticsJan 1, 201910 citations

1,000-Km Transmission of 1.5-Gb/S Y-00 Quantum Stream Cipher Using 4096-Level Intensity Modulation Signals

Fumio Futami, Ken Tanizawa, Kentaro Kato +1 more

A real-time 1.5-Gb/s Y-00 quantum stream cipher transmission for secure optical communication is experimentally demonstrated. An error-free $(\text{BER} transmission of 4096-level intensity-modulation cipher signals is achieved in a dispersion-managed link over 1,000 km. © 2019 The Author(s)

Conference on Lasers and Electro-OpticsMay 5, 20196 citations

Secure free-space optical transmission of IM and PSK Y-00 quantum stream cipher under dense fog conditions

Fumio Futami, Ken Tanizawa

We demonstrate free-space Y-00 cipher transmission in artificial dense fog with a high attenuation of 20 dB. The Y-00 cipher carrying 1.5 Gb/s IM and 10 Gb/s DP BPSK signals are securely transmitted in such a harsh condition where the FSO receiver is invisible from the transmitter.

IET conference proceedings.Nov 13, 20232 citations

Key Update using Y-00 Quantum Noise Stream Cipher with 20-bit Intensity Levels in a 1,000-km Optical Fiber Link

Fumio Futami, Ken Tanizawa

We demonstrate simultaneous intensity-modulated Y-00 cipher transmission of a private key at 200 kb/s and 1.5-Gb/s data over 1,000 km fiber. Highly secure key transmission with 1,048,576 (=220) intensity levels and key update are achieved.

Conference on Lasers and Electro-OpticsJan 1, 20212 citations

Transmission of Y-00 quantum cipher from transmitter using directly modulated DFB laser for secure access networks

Fumio Futami, Osamu Hirota

For purpose of realizing a compact transmitter of Y-00 quantum cipher, instead of an external modulator, a directly-modulated DFB laser is employed as EO converter. A 2.5-Gb/s Y-00 transmitter generating 4096-level intensity modulation signals is successfully applied to a transmission experiment, and error free (BER <; 10-9) transmission over 80 km is demonstrated. The transmission distance is limited by the loss of transmission fibers.

International Conference on Photonics in SwitchingSep 1, 20124 citations

40 Gbit/s (4 × 10 Gbit/s) Y-00 Protocol for Secure Optical Communication and its Transmission over 120 km

Fumio Futami, Osamu Hirota

WDM transmitter and receiver for physical stream cipher based on Y-00 protocol using 64-level intensity modulation are demonstrated for increasing transmission capacity. 40-Gb/s Y-00 signals are successfully transmitted over 120-km amplifier repeater transmission line.

Optical Fiber Communication ConferenceJan 1, 201212 citations