Prof. Osamu Hirota Profile

Prof. Osamu Hirota

at Tamagawa Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (24)

Proceedings Article | 18 September 2018 Paper

Experimental investigation of security parameter of Y-00 quantum stream cipher transceiver with randomization technique: part II

Fumio Futami, Ken Tanizawa, Kentaro Kato, Osamu Hirota

Proceedings Volume 10771, 1077114 (2018) https://doi.org/10.1117/12.2320820

KEYWORDS: Transceivers, Signal detection, Interference (communication), Binary data, Signal to noise ratio, Computer security, Quantum communications, Modulation, Sensors, Signal generators

Read Abstract +

Proceedings Article | 30 August 2017 Paper

Experimental investigation of security parameters of Y-00 quantum stream cipher transceiver with randomization technique: part I

Fumio Futami, Ken Tanizawa, Kentaro Kato, Osamu Hirota

Proceedings Volume 10409, 104090I (2017) https://doi.org/10.1117/12.2273462

KEYWORDS: Internet

Read Abstract +

Proceedings Article | 13 September 2016 Paper

A novel transceiver of the Y-00 quantum stream cipher with the randomization technique for optical communication with higher security performance

Fumio Futami, Kentaro Kato, Osamu Hirota

Proceedings Volume 9980, 99800O (2016) https://doi.org/10.1117/12.2237852

KEYWORDS: Quantum communications, Optical communications, Transceivers, Modulation, Receivers, Binary data, Signal detection, Signal generators, Signal attenuation, Fiber optic communications

Read Abstract +

Proceedings Article | 13 October 2014 Paper

Misinterpretation of statistical distance in security of quantum key distribution shown by simulation

Takehisa Iwakoshi, Osamu Hirota

Proceedings Volume 9254, 92540L (2014) https://doi.org/10.1117/12.2068143

KEYWORDS: Probability theory, Quantum key distribution, Quantum physics, Information security, Failure analysis, Binary data, Detection theory, Computer simulations, Network security, Quantum memory

Read Abstract +

Proceedings Article | 8 October 2014 Paper

Progress in Y-00 physical cipher for Giga bit/sec optical data communications (intensity modulation method)

Osamu Hirota, Fumio Futami

Proceedings Volume 9225, 92250J (2014) https://doi.org/10.1117/12.2061517

KEYWORDS: Information security, Computer security, Modulation, Receivers, Network security, Data communications, Data centers, Telecommunications, Quantum communications, Computing systems

Read Abstract +

Proceedings Article | 5 September 2014 Paper

Demonstration of 2.5 Gbit/sec free space optical communication by using Y-00 cipher: toward secure aviation systems

Fumio Futami, Osamu Hirota

Proceedings Volume 9202, 92020R (2014) https://doi.org/10.1117/12.2060933

KEYWORDS: Telecommunications, Receivers, Free space optical communications, Transmitters, Binary data, Signal detection, Free space, Free space optics, Data communications, Optical fibers

Read Abstract +

Proceedings Article | 29 October 2013 Paper

Polarity inversion attack prevention by physical properties of Y00 quantum stream cipher

Takehisa Iwakoshi, Osamu Hirota

Proceedings Volume 8899, 88990M (2013) https://doi.org/10.1117/12.2029029

KEYWORDS: Photons, Lithium, Telecommunications, Quantum communications, Photodetectors, Receivers, Sensors, Bismuth, Signal attenuation, Signal detection

Read Abstract +

Proceedings Article | 26 September 2013 Paper

Effect of decoherence in quantum reading with phase shift keying signal of entangled coherent states

Kentaro Kato, Osamu Hirota

Proceedings Volume 8875, 88750P (2013) https://doi.org/10.1117/12.2023151

KEYWORDS: Phase shift keying, Binary data, Signal attenuation, Quantum communications, Quantum information, Computer programming, Error analysis, Solids, Receivers, Modulators

Read Abstract +

Proceedings Article | 31 May 2013 Paper

Optical access system by Y-00 protocol at 2.5-Gb/s data rate for secure optical fiber communication

Fumio Futami, Osamu Hirota

Proceedings Volume 8720, 872013 (2013) https://doi.org/10.1117/12.2016348

KEYWORDS: Optical fibers, Transmitters, Wavelength division multiplexing, Receivers, Binary data, Signal detection, Telecommunications, Transceivers, Data communications, Computer security

Read Abstract +

Proceedings Article | 25 October 2012 Paper

Incompleteness and limit of security theory of quantum key distribution

Osamu Hirota, Dan Murakami, Kentaro Kato, Fumio Futami

Proceedings Volume 8518, 851807 (2012) https://doi.org/10.1117/12.929185

KEYWORDS: Quantum key distribution, Information security, Current controlled current source, Probability theory, Quantum communications, Failure analysis

Read Abstract +

Proceedings Article | 13 October 2011 Paper

Quantitative analysis of quantum noise masking in quantum stream cipher by intensity modulation operating at G-bit/sec data rate

Takehisa Iwakoshi, Fumio Futami, Osamu Hirota

Proceedings Volume 8189, 818915 (2011) https://doi.org/10.1117/12.897783

KEYWORDS: Modulation, Quantitative analysis, Data communications, Data acquisition, Computer security, Photonics, Defense systems, Information security, Current controlled current source, Atrial fibrillation

Read Abstract +

Proceedings Article | 7 September 2011 Paper

Randomization techniques for the intensity modulation-based quantum stream cipher and progress of experiment

Kentaro Kato, Osamu Hirota

Proceedings Volume 8163, 81630A (2011) https://doi.org/10.1117/12.893156

KEYWORDS: Modulation, Information security, Quantum communications, Computer security, Current controlled current source, Receivers, Quantum cryptography, Quantum information, Cryptography, Fiber optic communications

Read Abstract +

Proceedings Article | 30 August 2010 Paper

Quantum stream cipher beyond the Shannon limit of symmetric key cipher and the possibility of experimental demonstration

Osamu Hirota, Takehisa Iwakoshi, Masaki Sohma, Fumio Futami

Proceedings Volume 7815, 78150P (2010) https://doi.org/10.1117/12.860117

KEYWORDS: Computer security, Network security, Quantum communications, Current controlled current source, Optical networks, Clouds, Computing systems, Data centers

Read Abstract +

Proceedings Article | 26 August 2009 Paper

Experiments of 10 Gbit/sec quantum stream cipher applicable to optical Ethernet and optical satellite link

Osamu Hirota, Kenichi Ohhata, Makoto Honda, Shigeto Akutsu, Yoshifumi Doi, Katsuyoshi Harasawa, Kiichi Yamashita

Proceedings Volume 7465, 746509 (2009) https://doi.org/10.1117/12.825589

KEYWORDS: Information security, Receivers, Computer security, Transmitters, Quantum communications, Satellites, Modulation, Network security, Computing systems, Imaging systems

Read Abstract +

Proceedings Article | 5 September 2008 Paper

A quantum stream cipher by Yuen 2000 protocol with nonlinear random number generator

Kentaro Kato, Osamu Hirota

Proceedings Volume 7092, 70920H (2008) https://doi.org/10.1117/12.794584

KEYWORDS: Quantum communications, Nonlinear optics, Data transmission, Complex systems, Optical networks, Computer security

Read Abstract +

Proceedings Article | 25 September 2007 Paper

Quantum stream cipher: Part V. On the optimal modulation scheme and the implementation of deliberate signal randomization

Kentaro Kato, Osamu Hirota

Proceedings Volume 6710, 67100T (2007) https://doi.org/10.1117/12.733296

KEYWORDS: Phase shift keying, Modulation, Quadrature amplitude modulation, Signal detection, Quantum information, Binary data, Signal attenuation, Numerical simulations, Receivers, Quantum cryptography

Read Abstract +

Proceedings Article | 25 September 2007 Paper

10 Gbps quantum stream cipher by Y-00 for super HDTV transmission with provable security

Osamu Hirota, Tetsuya Shimizu, Takehiko Katayama, Katsuyoshi Harasawa

Proceedings Volume 6710, 67100K (2007) https://doi.org/10.1117/12.731378

KEYWORDS: Information security, Transmitters, Systems modeling, Network security, Modulation, Computer security, Telecommunications, Optical networks, Quantum communications, Quantum information

Read Abstract +

Proceedings Article | 29 August 2006 Paper

Quantum stream cipher Part IV: Effects of the deliberate signal randomization and the deliberate error randomization

Kentaro Kato, Osamu Hirota

Proceedings Volume 6305, 630508 (2006) https://doi.org/10.1117/12.680013

KEYWORDS: Binary data, Signal detection, Information security, Receivers, Modulators, Quantum information, Quantum cryptography, Modulation, Quantum physics, Interference (communication)

Read Abstract +

Proceedings Article | 25 August 2005 Paper

Quantum stream cipher Part III: Design of keyed randomization and experiment

Osamu Hirota, Tsuyoshi Usuda, Masaru Fuse

Proceedings Volume 5893, 589304 (2005) https://doi.org/10.1117/12.613080

KEYWORDS: Information security, Computer security, Modulation, Quantum information, Quantum cryptography, Cryptography, Transmitters, Quantum communications, Phase modulation, Modulators

Read Abstract +

Proceedings Article | 19 August 2005 Paper

Quantum quadrature amplitude modulation system and its applicability to coherent-state quantum cryptography

Kentaro Kato, Osamu Hirota

Proceedings Volume 5893, 589303 (2005) https://doi.org/10.1117/12.618719

KEYWORDS: Quadrature amplitude modulation, Receivers, Quantum cryptography, Binary data, Phase shift keying, Quantum physics, Signal attenuation, Photons, Detection theory, Signal detection

Read Abstract +

Proceedings Article | 1 June 2005 Paper

A quantum symmetric key cipher (Y-00) and key generation (Quantum stream cipher-Part II)

Osamu Hirota, Kentaro Kato, Masaki Sohma, Masaru Fuse

Proceedings Volume 5833, (2005) https://doi.org/10.1117/12.620487

KEYWORDS: Information security, Computer security, Probability theory, Quantum cryptography, Quantum communications, Cryptography, Quantum information, Quantum physics, Modulation, Binary data

Read Abstract +

Proceedings Article | 19 October 2004 Paper

Quantum stream cipher based on optical communications

Osamu Hirota, Kentaro Kato, Masaki Sohma, Tsuyoshi Usuda, Katsuyoshi Harasawa

Proceedings Volume 5551, (2004) https://doi.org/10.1117/12.561778

KEYWORDS: Information security, Modulation, Cryptography, Quantum cryptography, Quantum communications, Receivers, Quantum information, Computer security, Quantum physics, Optical communications

Read Abstract +

Proceedings Article | 3 February 2004 Paper

Quantum key distribution with unconditional security for all optical fiber network

Osamu Hirota, Kentaro Kato, Masaki Shoma, Tsuyoshi Usuda

Proceedings Volume 5161, (2004) https://doi.org/10.1117/12.504978

KEYWORDS: Information security, Quantum information, Telecommunications, Quantum communications, Modulation, Quantum physics, Network security, Receivers, Computer security, Quantum key distribution

Read Abstract +

Proceedings Article | 1 November 1993 Paper

Elimination of nonlinear PM and FM noises in optical amplifier repeater systems by squeezer

Tsuyoshi Sasaki, Tsuyoshi Satoh, Naoyuki Ubayama, Kouichi Yamazaki, Osamu Hirota

Proceedings Volume 2024, (1993) https://doi.org/10.1117/12.161351

KEYWORDS: Kerr effect, Optical amplifiers, Telecommunications, Optical fibers, Nonlinear optics, Signal to noise ratio, Phase modulation, Fermium, Frequency modulation, Fiber amplifiers

Read Abstract +