IEICE Trans

Takeshi OKAMOTO

400Gbit/s/ch Field Demonstration of Modulation Format Adaptation Based on Pilot-Aided OSNR Estimation Using Real-Time DSP Seiji OKAMOTO Kazushige YONENAGA Kengo HORIKOSHI Mitsuteru YOSHIDA Yutaka MIYAMOTO Masahito TOMIZAWA Takeshi OKAMOTO Hidemi NOGUCHI Jun-ichi ABE Junichiro MATSUI Hisao NAKASHIMA Yuichi AKIYAMA Takeshi HOSHIDA Hiroshi ONAKA Kenya SUGIHARA Soichiro KAMETANI Kazuo KUBO Takashi SUGIHARA
Publication: Publication Date: 2017/10/01 Vol. E100-B No. 10 pp. 1726-1733 Type of Manuscript: INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network) Category: Keyword: adaptive modulation, field trial, real-time DSP, 400Gbit/s,
	Summary \| Full Text:PDF(4.3MB)

Sender Authenticated Key Agreements without Random Oracles Chifumi SATO Takeshi OKAMOTO Eiji OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/08/01 Vol. E92-A No. 8 pp. 1787-1794 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Theory Keyword: authenticated key agreements, one-way functions, decision co-bilinear Diffie-Hellman problems, standard models,
	Summary \| Full Text:PDF(232.5KB)

An ID-SP-M4M Scheme and Its Security Analysis Lihua WANG Eiji OKAMOTO Ying MIAO Takeshi OKAMOTO Hiroshi DOI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/01/01 Vol. E90-A No. 1 pp. 91-100 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Signatures Keyword: series-parallel multisignature, pairing, ID-based, BDH assumption,
	Summary \| Full Text:PDF(316.9KB)

Authorization-Limited Transformation-Free Proxy Cryptosystems and Their Security Analyses Lihua WANG Zhenfu CAO Takeshi OKAMOTO Ying MIAO Eiji OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/01/01 Vol. E89-A No. 1 pp. 106-114 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Protocol Keyword: proxy cryptosystem, pairing, authorization-limited, transformation-free, BDH assumption,
	Summary \| Full Text:PDF(424.3KB)

A Fast Signature Scheme with New On-line Computation Takeshi OKAMOTO Hirofumi KATSUNO Eiji OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/05/01 Vol. E87-A No. 5 pp. 1154-1161 Type of Manuscript: Special Section LETTER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: digital signature, on-line computation, random oracle model, provable security,
	Summary \| Full Text:PDF(187KB)

On the Security of the Okamoto-Tanaka ID-Based Key Exchange Scheme against Active Attacks Seungjoo KIM Masahiro MAMBO Takeshi OKAMOTO Hiroki SHIZUYA Mitsuru TADA Dongho WON
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/01/01 Vol. E84-A No. 1 pp. 231-238 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: Okamoto-Tanaka key exchange scheme, ID-based scheme, active attack, known-key attack, forward secrecy,
	Summary \| Full Text:PDF(288.5KB)

A Distributed Approach against Computer Viruses Inspired by the Immune System Takeshi OKAMOTO Yoshiteru ISHIDA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2000/05/25 Vol. E83-B No. 5 pp. 908-915 Type of Manuscript: Special Section PAPER (IEICE/IEEE Joint Special Issue on Autonomous Decentralized Systems) Category: Communication and Computer Architecture/Assurance Systems Keyword: computer virus, immune system, agent, self-reference, cell division,
	Summary \| Full Text:PDF(505.5KB)