| 2023 | PIMRC | Performance Comparison of Channel Coding Methods for Optical Satellite Data Relay System. | Eiji Okamoto, Yuma Yamashita, Yohei Satoh, Mitsuhiro Nakadai, Takamasa Itahashi, Shiro Yamakawa |
| 2018 | VTC | Large-Scale Grant-Free Sparse Chaos Code Multiple Access Scheme for 5G IoT. | Eiji Okamoto, Naoto Horiike, Tetsuya Yamamoto |
| 2017 | APCC | Performance improvement of multi-user chaos MIMO transmission scheme using dirty paper coding. | Naoto Horiike, Eiji Okamoto, Tetsuya Yamamoto |
| 2017 | CCS | One-time Programs with Cloud Storage and Its Application to Electronic Money. | Takuya Kitamura, Kazumasa Shinagawa, Takashi Nishide, Eiji Okamoto |
| 2017 | VTC | Performance Improvement of Low-Latency V2I Uplink Using Superposed Cooperative V2V Transmission. | Eiji Okamoto, Hiraku Okada, Yoshinao Ishii, Satoshi Makido |
| 2016 | ASIACRYPT | Size-Hiding Computation for Multiple Parties. | Kazumasa Shinagawa, Koji Nuida, Takashi Nishide, Goichiro Hanaoka, Eiji Okamoto |
| 2016 | INDOCRYPT | Revocable Decentralized Multi-Authority Functional Encryption. | Hikaru Tsuchida, Takashi Nishide, Eiji Okamoto, Kwangjo Kim |
| 2016 | ISITA | Committed AND protocol using three cards with more handy shuffle. | Kazumasa Shinagawa, Koji Nuida, Takashi Nishide, Goichiro Hanaoka, Eiji Okamoto |
| 2016 | VTC | A Cooperative V2I Uplink Transmission Scheme Utilizing V2V Network Coding. | Eiji Okamoto, Keisuke Kunitomo, Hidenori Akita, Takuma Kyo |
| 2015 | APCC | R&D activities for 5G in IEICE technical committee on radio communication systems. | Hidekazu Murata, Eiji Okamoto, Manabu Mikami, Akihiro Okazaki, Satoshi Suyama, Takamichi Inoue, Jun Mashino, Tetsuya Yamamoto, Makoto Taromaru |
| 2015 | IWSEC | Secure Multi-Party Computation Using Polarizing Cards. | Kazumasa Shinagawa, Takaaki Mizuki, Jacob C. N. Schuldt, Koji Nuida, Naoki Kanayama, Takashi Nishide, Goichiro Hanaoka, Eiji Okamoto |
| 2015 | ProvSec | Multi-party Computation with Small Shuffle Complexity Using Regular Polygon Cards. | Kazumasa Shinagawa, Takaaki Mizuki, Jacob C. N. Schuldt, Koji Nuida, Naoki Kanayama, Takashi Nishide, Goichiro Hanaoka, Eiji Okamoto |
| 2015 | VTC | An Improved Proportional Fair Scheduling in Downlink Non-Orthogonal Multiple Access System. | Eiji Okamoto |
| 2015 | SECRYPT | Gateway Threshold Password-based Authenticated Key Exchange Secure against Undetectable On-line Dictionary Attack. | Yukou Kobayashi, Naoto Yanai, Kazuki Yoneyama, Takashi Nishide, Goichiro Hanaoka, Kwangjo Kim, Eiji Okamoto |
| 2014 | ISITA | A CDH-based ordered multisignature scheme in the standard model with better efficiency. | Naoto Yanai, Masahiro Mambo, Eiji Okamoto |
| 2014 | ProvSec | A Short Fail-Stop Signature Scheme from Factoring. | Takashi Yamakawa, Nobuaki Kitajima, Takashi Nishide, Goichiro Hanaoka, Eiji Okamoto |
| 2014 | TrustCom | A Privacy-Enhanced Access Log Management Mechanism in SSO Systems from Nominative Signatures. | Sanami Nakagawa, Keita Emura, Goichiro Hanaoka, Akihisa Kodate, Takashi Nishide, Eiji Okamoto, Yusuke Sakai |
| 2013 | COMPSAC | A Device for Transparent Probabilistic Packet Marking. | Masayuki Okada, Nasato Goto, Akira Kanaoka, Eiji Okamoto |
| 2013 | IWCMC | Interference-aware weighting scheme for satellite/terrestrial integrated mobile communication system. | Akihisa Tanaka, Eiji Okamoto, Hiroyuki Tsuji, Yoshiyuki Fujino |
| 2013 | Pairing | Constructing Symmetric Pairings over Supersingular Elliptic Curves with Embedding Degree Three. | Tadanori Teruya, Kazutaka Saito, Naoki Kanayama, Yuto Kawahara, Tetsutaro Kobayashi, Eiji Okamoto |
| 2012 | VTC | An Effective Channel Estimation Scheme for Bi-Directional Two-Timeslot OFDM Relay Transmission Using Analog Network Coding. | Yuta Koshimizu, Eiji Okamoto |
| 2012 | SECRYPT | Identity-based Password-Authenticated Key Exchange for Client/Server Model. | Xun Yi, Raylin Tso, Eiji Okamoto |
| 2011 | IWSEC | Cryptographic Pairings Based on Elliptic Nets. | Naoki Ogura, Naoki Kanayama, Shigenori Uchiyama, Eiji Okamoto |
| 2011 | Networking | BlueSnarf Revisited: OBEX FTP Service Directory Traversal. | Alberto Moreno, Eiji Okamoto |
| 2011 | PST | Cryptographic security models for eHealth P2P database management systems network. | Sk. Md. Mizanur Rahman, Md. Mehedi Masud, Carlisle Adams, Khalil El-Khatib, Hussein T. Mouftah, Eiji Okamoto |
| 2011 | VTC | A Chaos MIMO Transmission Scheme for Secure Communications on Physical Layer. | Eiji Okamoto |
| 2011 | SECRYPT | Three-party Password-authenticated Key Exchange without Random Oracles. | Xun Yi, Raylin Tso, Eiji Okamoto |
| 2010 | ATC | Design and Analysis of "Flexible" | Raylin Tso, Xun Yi, Tadahiko Ito, Takeshi Okamoto, Eiji Okamoto |
| 2010 | GLOBECOM | An Efficient LDGM Coding Scheme for Optical Satellite-to-Ground Link Based on a New Channel Model. | Yoshitoshi Yamashita, Eiji Okamoto, Yasunori Iwanami, Yozo Shoji, Morio Toyoshima, Yoshihisa Takayama |
| 2010 | ICICS | Identity-Based Proxy Cryptosystems with Revocability and Hierarchical Confidentialities. | Lihua Wang, Licheng Wang, Masahiro Mambo, Eiji Okamoto |
| 2010 | ISITA | MIMO MFSK receivers using FDE and MLD on quasi-static frequency selective fading channels. | Kenji Nakayama, Yasunori Iwanami, Eiji Okamoto |
| 2010 | Pairing | High-Speed Software Implementation of the Optimal Ate Pairing over Barreto-Naehrig Curves. | Jean-Luc Beuchat, Jorge Enrique Gonzlez-Daz, Shigeo Mitsunari, Eiji Okamoto, Francisco Rodrguez-Henrquez, Tadanori Teruya |
| 2010 | Pairing | New Identity-Based Proxy Re-encryption Schemes to Prevent Collusion Attacks. | Lihua Wang, Licheng Wang, Masahiro Mambo, Eiji Okamoto |
| 2010 | WCNC | On the Improvement of Maximum Likelihood Detection in Multiple Relay Systems. | Azlan Abd Aziz, Yasunori Iwanami, Eiji Okamoto |
| 2009 | CHES | Hardware Accelerator for the Tate Pairing in Characteristic Three Based on Karatsuba-Ofman Multipliers. | Jean-Luc Beuchat, Jrmie Detrey, Nicolas Estibals, Eiji Okamoto, Francisco Rodrguez-Henrquez |
| 2009 | CRiSIS | A quantitative approach to assess information security related risks. | Anton Romanov, Eiji Okamoto |
| 2009 | ISPEC | Strongly Unforgeable ID-Based Signatures without Random Oracles. | Chifumi Sato, Takeshi Okamoto, Eiji Okamoto |
| 2009 | IWSEC | ID-Based Group Password-Authenticated Key Exchange. | Xun Yi, Raylin Tso, Eiji Okamoto |
| 2009 | SECRYPT | An Approach for Designing of Enterprise IT Landscapes to Perform Quantitave Information Security Risk Assessment. | Anton Romanov, Eiji Okamoto |
| 2008 | APSCC | A Restricted Undeniable Designated Verifier Signature. | Atsushi Koide, Raylin Tso, Takeshi Okamoto, Eiji Okamoto |
| 2008 | EUC | A Sanitizing Signature Scheme with Indexing. | Atsushi Koide, Raylin Tso, Eiji Okamoto |
| 2008 | EUC | Convertible Undeniable Partially Blind Signature from Bilinear Pairings. | Atsushi Koide, Raylin Tso, Eiji Okamoto |
| 2008 | ISIT | Efficient convertible Limited Verifier Signatures. | Raylin Tso, Xun Yi, Takeshi Okamoto, Eiji Okamoto |
| 2008 | ISPEC | An Efficient Countermeasure against Side Channel Attacks for Pairing Computation. | Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto |
| 2008 | ISPEC | 1-out-of-. | Raylin Tso, Takeshi Okamoto, Eiji Okamoto |
| 2008 | Pairing | A Comparison between Hardware Accelerators for the Modified Tate Pairing over F | Jean-Luc Beuchat, Nicolas Brisebarre, Jrmie Detrey, Eiji Okamoto, Francisco Rodrguez-Henrquez |
| 2007 | APSCC | ID-Based Key Agreement for Dynamic Peer Groups in Mobile Computing Environments. | Raylin Tso, Xun Yi, Eiji Okamoto |
| 2007 | ARITH | An Algorithm for the nt Pairing Calculation in Characteristic Three and its Hardware Implementation. | Jean-Luc Beuchat, Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto |
| 2007 | CANS | Efficient ID-Based Digital Signatures with Message Recovery. | Raylin Tso, Chunxiang Gu, Takeshi Okamoto, Eiji Okamoto |
| 2007 | CHES | Arithmetic Operators for Pairing-Based Cryptography. | Jean-Luc Beuchat, Nicolas Brisebarre, Jrmie Detrey, Eiji Okamoto |
| 2007 | ISPEC | Some Efficient Algorithms for the Final Exponentiation of | Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto |
| 2007 | PIMRC | A Comparison of Time Domain Equalizers by Block Processing in SISO Single Carrier Transmission. | Yusuke Takahashi, Yasunori Iwanami, Eiji Okamoto |
| 2007 | WAIFI | A Coprocessor for the Final Exponentiation of the | Jean-Luc Beuchat, Nicolas Brisebarre, Masaaki Shirase, Tsuyoshi Takagi, Eiji Okamoto |
| 2007 | WISA | Universal | Masaaki Shirase, Yuto Kawahara, Tsuyoshi Takagi, Eiji Okamoto |
| 2006 | ACISP | A Novel Range Test. | Kun Peng, Colin Boyd, Ed Dawson, Eiji Okamoto |
| 2006 | CIS | Efficient Implementation of Tate Pairing on a Mobile Phone Using Java. | Yuto Kawahara, Tsuyoshi Takagi, Eiji Okamoto |
| 2005 | CANS | A Novel Method to Maintain Privacy in Mobile Agent Applications. | Kun Peng, Ed Dawson, Juanma Gonzlez Nieto, Eiji Okamoto, Javier Lpez |
| 2005 | CIS | Insider Impersonation-MIM Attack to Tripartite Key Agreement Scheme and an Efficient Protocol for Multiple Keys. | Lihua Wang, Takeshi Okamoto, Tsuyoshi Takagi, Eiji Okamoto |
| 2005 | MDAI | Cryptosystems Based on Elliptic Curve Pairing. | Eiji Okamoto, Takeshi Okamoto |
| 2005 | MDAI | One-Way and Two-Party Authenticated ID-Based Key Agreement Protocols Using Pairing. | Takeshi Okamoto, Raylin Tso, Eiji Okamoto |
| 2003 | ICISC | A New Algorithm for Searching a Consistent Set of Shares in a Threshold Scheme with Cheaters. | Raylin Tso, Ying Miao, Eiji Okamoto |
| 2002 | ACISP | Modelling Trust Structures for Public Key Infrastructures. | Marie Henderson, Robert S. Coulter, Ed Dawson, Eiji Okamoto |
| 2002 | ITW | Cryptosystems based on polynomials over finite fields. | Eiji Okamoto |
| 2001 | VTC | One-way multimode transmission using block-coded modulation for mobile communications. | Eiji Okamoto, Hiroyo Ogawa |
| 2000 | ACISP | On the Security of the RSA-Based Multisignature Scheme for Various Group Structures. | Hiroshi Doi, Masahiro Mambo, Eiji Okamoto |
| 2000 | PKC | A Structured ElGamal-Type Multisignature Scheme. | Mike Burmester, Yvo Desmedt, Hiroshi Doi, Masahiro Mambo, Eiji Okamoto, Mitsuru Tada, Yuko Yoshifuji |
| 1999 | ICICS | User Identification System Based on Biometrics for Keystroke. | Kazumasa Omote, Eiji Okamoto |
| 1999 | ICISC | Verfiable Secret Sharing and Time Capsules. | Josef Pieprzyk, Eiji Okamoto |
| 1999 | WCNC | A class-coded modulation method using orthogonal wavelets. | Eiji Okamoto, Huan-Bang Li, Masato Tanaka, Hiromitsu Wakana |
| 1998 | ACISP | A User Identification System Using Signature Written with Mouse. | Agus Fanar Syukri, Eiji Okamoto, Masahiro Mambo |
| 1998 | SRDS | A Security Auction-Like Negotiation Protocol for Agent-Based Internet Trading. | Xun Yi, Xiao Feng Wang, Kwok-Yan Lam, Eiji Okamoto, D. Frank Hsu |
| 1997 | ACISP | Protection of Data and Delegated Keys in Digital Distribution. | Masahiro Mambo, Eiji Okamoto, Kouichi Sakurai |
| 1997 | ICICS | Proposal of user identification scheme using mouse. | Kenichi Hayashi, Eiji Okamoto, Masahiro Mambo |
| 1997 | NSPW | A tentative approach to constructing tamper-resistant software. | Masahiro Mambo, Takanori Murayama, Eiji Okamoto |
| 1996 | ASIACRYPT | How to Utilize the Transformability of Digital Signatures for Solving the Oracle Problem. | Masahiro Mambo, Kouichi Sakurai, Eiji Okamoto |
| 1996 | CCS | Proxy Signatures for Delegating Signing Operation. | Masahiro Mambo, Keisuke Usuda, Eiji Okamoto |
| 1996 | PIMRC | Rayleigh fading compensation for QAM by using FFT. | Eiji Okamoto, Huan-Bang Li, Tetsushi Ikegami |
| 1994 | CRYPTO | Ciphertext Only Attack for One-way Function of the MAP Using One Ciphertext. | Yukiyasu Tsunoo, Eiji Okamoto, Tomohiko Uyematsu |
| 1988 | EuroCrypt | Substantial Number of Cryptographic Keys and Its Application to Encryption Designs. | Eiji Okamoto |
| 1987 | CRYPTO | Key Distribution Systems Based on Identification Information. | Eiji Okamoto |
| 1985 | CRYPTO | Lifetimes of Keys in Cryptographic Key Management Systems. | Eiji Okamoto, K. Nakamura |