Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

European Conference on Optical Communication

Real-time 70 Gbit/s, 128 QAM quantum noise stream cipher transmission over 100 km with secret keys delivered by continuous variable quantum key distribution system

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai, Takuya Hirano

Published Jan 1, 2016• 1 citation
OpenAlex

Related papers

[JSAP-OSA Joint Symposia 2017 Invited Talk] Real-time 70 Gbit/s, 128 QAM quantum noise stream cipher transmission over 100 km with secret keys delivered by continuous variable quantum key distribution system

Masataka Nakazawa

The Japan Society of Applied Physics•Jul 21, 2017•0 citations

Secure Transmission using QAM Quantum Noise Stream Cipher with Continuous Variable QKD

Masataka Nakazawa, Masato Yoshida, Takuya Hirano

We describe a real-time 70 Gbit/s, 128 QAM quantum noise stream cipher transmission system with a continuous variable quantum key distribution system, which enables encrypted data to be transmitted over 100 km.

Optical Fiber Communication Conference•Jan 1, 2018•6 citations

Real-time 70 Gbit/s, 128 QAM quantum noise stream cipher transmission over 100 km with secret keys delivered by continuous variable quantum key distribution system

Masataka Nakazawa

We have been intensively studying quantum noise stream cipher (QNSC) transmission technique using quadrature amplitude modulation (QAM) with a view to realizing a high-speed and long-distance secure communication system [1]. In this talk, we describe our recent demonstration of an on-line 70 Gbit/s, 128 QAM/QNSC transmission over 100 km with a continuous variable quantum key distribution (CV-QKD) system [2], in which a shared key is transmitted online via the CV-QKD so that the key is shared for a certain time period with absolutely no risk of being eavesdropped.

JSAP-OSA Joint Symposia•Jan 1, 2017•3 citations

Transmission of 100 Gbit/s (10×10 Gbit/s) Y-00 Quantum Stream Cipher for Secure Communication

Fumio Futami, Osamu Hirota

•Jan 1, 2014•0 citations

360km field transmission of 10 Gbit/s stream cipher by quantum noise for optical network

Akutsu, Harasawa, Hirota +3 more

Optical Fiber Communication Conference•Jan 1, 2010•0 citations

Real-time adaptive 4–64 QAM, 20–60 Gbit/s quantum noise stream cipher transmission over 320 km with FPGA-based transmitter and receiver

Masato Yoshida, Toshihiko Hirooka, Keisuke Kasai +1 more

We demonstrate a real-time adaptive 4-64 QAM, 20-60 Gbit/s quantum noise stream cipher transmission over 320 km with an FPGA-based transmitter and receiver. The QAM data multiplicity can be randomly changed on-line, which increases the encryption security.

European Conference on Optical Communication•Sep 1, 2015•9 citations
We have been intensively studying quantum noise stream cipher (QNSC) transmission technique using quadrature amplitude modulation (QAM) with a view to realizing a high-speed and long-distance secure communication system [1]. In this talk, we describe our recent demonstration of an on-line 70 Gbit/s, 128 QAM/QNSC transmission over 100 km with a continuous variable quantum key distribution (CV-QKD) system [2], in which a shared key is transmitted online via the CV-QKD so that the key is shared for a certain time period with absolutely no risk of being eavesdropped.