Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Ryo Namiki"'
Publikováno v:
IEEE Access, Vol 8, Pp 207134-207140 (2020)
The number of computers that provide information services via the Internet is constantly increasing, particularly for IoT applications. Compared to the servers in managed data centers, IoT computers have an increased risk of contamination from uniden
Externí odkaz:
https://doaj.org/article/1b4194b5154b4a0ab100b656e71e35af
Autor:
Ryo Namiki
Publikováno v:
Journal of the Physical Society of Japan. 92
We analyze the security against collective attacks for a homodyne-based continuous-variable quantum key distribution protocol using binary coherent states and postselection. We derive a lower bound of the secret key rate in an asymptotic scenario, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b2322892dd94acbdc3867e10a12cef1
https://doi.org/10.7566/jpsj.92.014001
https://doi.org/10.7566/jpsj.92.014001
Publikováno v:
IEEE Access, Vol 8, Pp 207134-207140 (2020)
The number of computers that provide information services via the Internet is constantly increasing, particularly for IoT applications. Compared to the servers in managed data centers, IoT computers have an increased risk of contamination from uniden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80b0eb6fffa8c1411592658b99322d9e
https://doi.org/10.1109/access.2020.3038200
https://doi.org/10.1109/access.2020.3038200
Autor:
Benjamin J. Puttnam, Georg Rademacher, Takuya Hirano, Yoshinari Awaji, Ruben S. Luis, Masahide Sasaki, Tobias A. Eriksson, Naoya Wada, Mikio Fujiwara, Ryo Namiki, Masahiro Takeoka
Publikováno v:
Communications Physics, Vol 2, Iss 1, Pp 1-8 (2019)
Quantum key distribution (QKD) can offer communication with unconditional security and is a promising technology to protect next generation communication systems. For QKD to see commercial success, several key challenges have to be solved, such as in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bb23b1fce76503ec5cabaf8eef23273
http://link.springer.com/article/10.1038/s42005-018-0105-5
http://link.springer.com/article/10.1038/s42005-018-0105-5
Autor:
Keisuke Kasai, Masato Yoshida, Takuya Hirano, Ryo Namiki, Toshihiko Hirooka, Tsubasa Ichikawa, Masataka Nakazawa
Publikováno v:
IEEE Journal of Quantum Electronics. 53:1-16
We report the first on-line high-speed and large-capacity secure optical communication system. This was realized by combining a quadrature amplitude modulation/quantum noise stream cipher technology where a coherent multi-level optical signal is hidd
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcf2a0c9afd0609ac4c2db850de74ceb
https://doi.org/10.1109/jqe.2017.2708523
https://doi.org/10.1109/jqe.2017.2708523
Autor:
Masahide Sasaki, Yoshinari Awaji, Benjamin J. Puttnam, Mikio Fujiwara, Takuya Hirano, Ryo Namiki, Tobias A. Eriksson, Georg Rademacher, Naoya Wada, Ruben S. Luis, Masahiro Takeoka
Publikováno v:
OSA Advanced Photonics Congress (AP) 2019 (IPR, Networks, NOMA, SPPCom, PVLED).
We discuss impairments and design of fiber links supporting co-propagation of quantum key distribution and classical signals.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07b74a8d7213708e244ef342af48a180
https://doi.org/10.1364/sppcom.2019.qtw3e.2
https://doi.org/10.1364/sppcom.2019.qtw3e.2
We have developed a method to calculate a secret key rate of a continuous-variable quantum-key-distribution scheme using four coherent states and postselection for a general model of Gaussian attacks. We assume that the transmission line and detectio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc161e4435079335e47c085b04fd6a9f
http://arxiv.org/abs/1810.11457
http://arxiv.org/abs/1810.11457
Autor:
Mikio Fujiwara, Ryo Namiki, Masahide Sasaki, Takuya Hirano, Akio Tajima, Ken-ichiro Yoshino, Tobias A. Eriksson, Motoharu Ono, Masahiro Takeoka
We study coexistence of CV-QKD and 7 classical 12.5 Gbit/s on-off keying channels in WDM transmission over the C-band. We demonstrate key generation with a distilled secret key rate between 20 to 50 kbit/s in experiments running continuously over 24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42214c569aa705f453d4e598e0b2ca1f
http://arxiv.org/abs/1809.01287
http://arxiv.org/abs/1809.01287
Autor:
Georg Rademacher, Masahiro Takeoka, Mikio Fujiwara, Tobias A. Eriksson, Takuya Hirano, Ryo Namiki, Yoshinari Awaji, Ruben S. Luis, Benjamin J. Puttnam, Masahide Sasaki, Naoya Wada
Publikováno v:
ECOC
We study the impact of in-band ASE noise on the performance of CV-QKD over 10 km of fiber. We demonstrate co-propagation of CV-QKD and 3.5 Tbit/s classical coherent channels and show stable key generation over 48 hours.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47cde28065dc28681566cfcfa1a692b6
https://doi.org/10.1109/ecoc.2018.8535421
https://doi.org/10.1109/ecoc.2018.8535421
Publikováno v:
Physical Review A. 94
We investigate a quantum repeater scheme for quantum key distribution based on the work by Muralidharan et al., Phys. Rev. Lett. 112, 250501 (2014). Our scheme extends that work by making use of error syndrome measurement outcomes available at the re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d54acf770971f1122084605682e6ee61
https://doi.org/10.1103/physreva.94.052304
https://doi.org/10.1103/physreva.94.052304