IEICE Trans

Tatsuaki OKAMOTO

Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs Pratish DATTA Tatsuaki OKAMOTO Katsuyuki TAKASHIMA
Publication: Publication Date: 2021/01/01 Vol. E104-A No. 1 pp. 25-57 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: attribute-based signatures, arithmetic branching programs, arithmetic span programs, concrete efficiency, unbounded multi-use of attributes, bilinear groups,
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Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption Pratish DATTA Tatsuaki OKAMOTO Katsuyuki TAKASHIMA
Publication: Publication Date: 2020/07/01 Vol. E103-D No. 7 pp. 1556-1597 Type of Manuscript: Special Section PAPER (Special Section on Information and Communication System Security) Category: Cryptographic Techniques Keyword: predicate encryption, partially-hiding, simulation-based adaptive security, arithmetic branching programs, inner products,
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Efficient Inner Product Functional Encryption with Full-Hiding Security Junichi TOMIDA Masayuki ABE Tatsuaki OKAMOTO
Publication: Publication Date: 2020/01/01 Vol. E103-A No. 1 pp. 33-40 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: functional encryption, inner product, function privacy, pairing,
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Decentralized Attribute-Based Encryption and Signatures Tatsuaki OKAMOTO Katsuyuki TAKASHIMA
Publication: Publication Date: 2020/01/01 Vol. E103-A No. 1 pp. 41-73 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: attribute-based encryption, attribute-based signatures, decentralized multi-authority system, non-monotone predicates,
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A Secure M + 1st Price Auction Protocol Based on Bit Slice Circuits Takuho MITSUNAGA Yoshifumi MANABE Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2016/08/01 Vol. E99-A No. 8 pp. 1591-1599 Type of Manuscript: PAPER Category: Cryptography and Information Security Keyword: secure auction protocol, M+1st price auction, Boneh-Goh-Nissim encryption, mix-and-match protocol,
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Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption Tatsuaki OKAMOTO Katsuyuki TAKASHIMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2016/01/01 Vol. E99-A No. 1 pp. 92-117 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: functional encryption, inner product encryption, attribute-hiding,
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Packing Messages and Optimizing Bootstrapping in GSW-FHE Ryo HIROMASA Masayuki ABE Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2016/01/01 Vol. E99-A No. 1 pp. 73-82 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: lattice-based cryptography, fully homomorphic encryption, bootstrapping, SIMD operations,
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Dual Pairing Vector Spaces and Their Applications Tatsuaki OKAMOTO Katsuyuki TAKASHIMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2015/01/01 Vol. E98-A No. 1 pp. 3-15 Type of Manuscript: INVITED PAPER (Special Section on Cryptography and Information Security) Category: Keyword: bilinear pairings, dual pairing vector spaces, DPVS, functional encryption, attribute-based encryption, inner-product encryption, attribute-based signatures,
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Efficient Secure Auction Protocols Based on the Boneh-Goh-Nissim Encryption Takuho MITSUNAGA Yoshifumi MANABE Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/01/01 Vol. E96-A No. 1 pp. 68-75 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Public Key Based Protocols Keyword: secure auction, 1st price auction, 2nd price auction, Boneh-Goh-Nissim encryption, mix-and-match protocol,
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Efficient (Hierarchical) Inner-Product Encryption Tightly Reduced from the Decisional Linear Assumption Tatsuaki OKAMOTO Katsuyuki TAKASHIMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/01/01 Vol. E96-A No. 1 pp. 42-52 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Public Key Based Protocols Keyword: functional encryption, inner-product encryption, attribute-hiding, tight security reduction, short ciphertexts/secret-keys,
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Message Recovery Signature Schemes from Sigma-Protocols Masayuki ABE Tatsuaki OKAMOTO Koutarou SUZUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/01/01 Vol. E96-A No. 1 pp. 92-100 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Public Key Based Protocols Keyword: message recovery signatures, Sigma-protocol, chosen message attacks,
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Chosen Ciphertext Security with Optimal Ciphertext Overhead Masayuki ABE Eike KILTZ Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/01/01 Vol. E93-A No. 1 pp. 22-33 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Public Key Cryptography Keyword: chosen-ciphertext security, OAEP, ciphertext overhead,
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Universally Composable Identity-Based Encryption Ryo NISHIMAKI Yoshifumi MANABE Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/01/01 Vol. E91-A No. 1 pp. 262-271 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Security Notions Keyword: identity-based encryption, IND-ID-CCA2, universal composition,
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On the Equivalence of Several Security Notions of KEM and DEM Waka NAGAO Yoshifumi MANABE Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/01/01 Vol. E91-A No. 1 pp. 283-297 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Security Notions Keyword: universal composability, KEM, DEM, ISO, IND-CCA2, NM-CCA2, IND-P2-C2, NM-P2-C2,
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A Universally Composable Secure Channel Based on the KEM-DEM Framework Waka NAGAO Yoshifumi MANABE Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/01/01 Vol. E89-A No. 1 pp. 28-38 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Public Key Cryptography Keyword: universally composable, KEM, DEM, ISO, IND-CCA2, NM-CCA2,
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Security and Performance Evaluation of ESIGN and RSA on IC Cards by Using Byte-Unit Modular Algorithms Chung-Huang YANG Hikaru MORITA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2005/03/01 Vol. E88-B No. 3 pp. 1244-1248 Type of Manuscript: LETTER Category: Fundamental Theories for Communications Keyword: digital signature, ESIGN, PKI, smartcards, modular arithmetic,
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Delegation Chains Secure up to Constant Length Masayuki ABE Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2002/01/01 Vol. E85-A No. 1 pp. 110-116 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: proxy signature, delegation chains, ID-based signatures, random oracles,
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A Signature Scheme with Message Recovery as Secure as Discrete Logarithm Masayuki ABE Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/01/01 Vol. E84-A No. 1 pp. 197-204 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: digital signature with message recovery, random oracle model, concrete security analysis, provable security, elliptic curve cryptosystem,
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Cryptographic Works of Dr. Kenji Koyama: In Memoria Noboru KUNIHIRO Kazuo OHTA Tatsuaki OKAMOTO Routo TERADA Yukio TSURUOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/01/01 Vol. E84-A No. 1 pp. 108-113 Type of Manuscript: INVITED PAPER (Special Section on Cryptography and Information Security) Category: Keyword: modern cryptography, key management, zero-knowledge proof, elliptic curve applications,
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A Chosen-Cipher Secure Encryption Scheme Tightly as Secure as Factoring Eiichiro FUJISAKI Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/01/01 Vol. E84-A No. 1 pp. 179-187 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: chosen-cipher security, factoring, random oracle, exact security,
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How to Enhance the Security of Public-Key Encryption at Minimum Cost Eiichiro FUJISAKI Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/01/25 Vol. E83-A No. 1 pp. 24-32 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: indistinguishability, chosen-plaintext attack, adaptive chosen-ciphertext attack, random oracle model,
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FOREWORD Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/01/25 Vol. E83-A No. 1 pp. 1-1 Type of Manuscript: FOREWORD Category: Keyword:
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Multi-Signature Schemes Secure against Active Insider Attacks Kazuo OHTA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/01/25 Vol. E82-A No. 1 pp. 21-31 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: digital signature, Fiat-Shamir scheme, Schnorr scheme, random oracle model, zero-knowledge interactive proof, provable security,
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Statistical Zero-Knowledge Protocols to Prove Modular Polynomial Relations Eiichiro FUJISAKI Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/01/25 Vol. E82-A No. 1 pp. 81-92 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: bit commitment, statistical zero-knowledge, argument of knowledge,
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Threshold Key-Recovery Systems for RSA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/01/25 Vol. E82-A No. 1 pp. 48-54 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: key recovery, key escrow, secret sharing, threshold scheme,
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Security of the Extended Fiat-Shamir Schemes Kazuo OHTA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/01/25 Vol. E81-A No. 1 pp. 65-71 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: the Fiat-Shamir scheme, zero-knowledge proof, identification, no-transferable information, digital signatures,
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Practical Escrow Cash Schemes Eiichiro FUJISAKI Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/01/25 Vol. E81-A No. 1 pp. 11-19 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: escrow, trustee, electronic cash, money laundering, extortion crime,
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One-Time Zero-Knowledge Authentications and Their Applications to Untraceable Electronic Cash Tatsuaki OKAMOTO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/01/25 Vol. E81-A No. 1 pp. 2-10 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: electronic cash, zero-knowledge proofs, untraceability, off-line cash,
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On the Complexity of the Discrete Logarithm for a General Finite Group Tatsuaki OKAMOTO Kouichi SAKURAI Hiroki SHIZUYA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/01/25 Vol. E79-A No. 1 pp. 61-65 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: discrete logarithm, computational complexity, cryptography,
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Interactive Bi-proof Systems and Undeniable Signature Schemes Atsushi FUJIOKA Tatsuaki OKAMOTO Kazuo OHTA
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 1992/01/25 Vol. E75-D No. 1 pp. 102-109 Type of Manuscript: Special Section PAPER (Special Section on Theoretical Foundations of Computing) Category: Keyword: interactive proof system, random self-reducibility, minimum knowledgeness, digital signature,
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Elliptic Curve Cryptosytems and Their Applications Kenji KOYAMA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 1992/01/25 Vol. E75-D No. 1 pp. 50-57 Type of Manuscript: Special Section PAPER (Special Section on Theoretical Foundations of Computing) Category: Keyword: public-key cryptosystem, elliptic curve, factoring,
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Abuses of Undeniable Signatures and Their Countermeasures Kazuo OHTA Tatsuaki OKAMOTO Atsushi FUJIOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1991/08/25 Vol. E74-A No. 8 pp. 2109-2113 Type of Manuscript: Special Section PAPER (Special Issue on Cryptography and Information Security) Category: Keyword:
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Membership Authentication for Hierarchical Multigroups Using a Master Secret Key Kazuo OHTA Tatsuaki OKAMOTO
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1990/07/25 Vol. E73-E No. 7 pp. 1107-1110 Type of Manuscript: Special Section PAPER (Special Issue on Cryptography and Information Security) Category: Authentication Techniques Keyword:
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