Keyword : random oracle model


Meeting Tight Security for Multisignatures in the Plain Public Key Model
Naoto YANAI 
Publication:   
Publication Date: 2018/09/01
Vol. E101-A  No. 9 ; pp. 1484-1493
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
multisignaturesplain public key modelprovable securitytight reductionrandom oracle modelCDH problem
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Tighter Reductions for Deterministic Identity-Based Signatures
Naoto YANAI Toru FUJIWARA 
Publication:   
Publication Date: 2018/01/01
Vol. E101-A  No. 1 ; pp. 64-76
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
identity-based signaturesdeterministic identity-based signaturesprovable securityCDH problemrandom oracle modeltight reduction
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Rational Proofs against Rational Verifiers
Keita INASAWA Kenji YASUNAGA 
Publication:   
Publication Date: 2017/11/01
Vol. E100-A  No. 11 ; pp. 2392-2397
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
rational proofdelegation of computationgame theoryrandom oracle model
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Provably Secure Structured Signature Schemes with Tighter Reductions
Naoto YANAI Tomoya IWASAKI Masaki INAMURA Keiichi IWAMURA 
Publication:   
Publication Date: 2017/09/01
Vol. E100-A  No. 9 ; pp. 1870-1881
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
structured signaturesidentity-based structured signaturesprovable securityCDH problemrandom oracle modeltight reduction
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Certificateless Key Agreement Protocols under Strong Models
Denise H. GOYA Dionathan NAKAMURA Routo TERADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/10/01
Vol. E99-A  No. 10 ; pp. 1822-1832
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
authenticated key agreementcertificateless public key encryptioncertificateless key agreementID-based encryptionsecurity modelsrandom oracle modelbilinear pairingsbilinear Diffie-Hellman problem
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id-eCK Secure ID-Based Authenticated Key Exchange on Symmetric and Asymmetric Pairing
Atsushi FUJIOKA Fumitaka HOSHINO Tetsutaro KOBAYASHI Koutarou SUZUKI Berkant USTAOLU Kazuki YONEYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/06/01
Vol. E96-A  No. 6 ; pp. 1139-1155
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
identity-based authenticated key exchangegap Bilinear Diffie-Hellman assumptionidentity-based extended Canetti-Krawczyk modelrandom oracle model
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Modeling Leakage of Ephemeral Secrets in Tripartite/Group Key Exchange
Mark MANULIS Koutarou SUZUKI Berkant USTAOGLU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/01/01
Vol. E96-A  No. 1 ; pp. 101-110
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Public Key Based Protocols
Keyword: 
group key exchangegroup-oriented extended Canetti-Krawczyk modeltripartite key exchangegap Bilinear Diffie-Hellman assumptionrandom oracle model
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Security of Sequential Multiple Encryption
Atsushi FUJIOKA Yoshiaki OKAMOTO Taiichi SAITO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/01/01
Vol. E95-A  No. 1 ; pp. 57-69
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Public Key Cryptography
Keyword: 
multiple encryptionsequential constructionrandom oracle modelFujisaki-Okamoto conversion
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A Secure Structured Multisignature Scheme Based on a Non-commutative Ring Homomorphism
Naoto YANAI Eikoh CHIDA Masahiro MAMBO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/06/01
Vol. E94-A  No. 6 ; pp. 1346-1355
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
multisignature schemestructured multisignature schemehomomorphic schemenon-commutative ring homomorphismrandom oracle model
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Leaky Random Oracle
Kazuki YONEYAMA Satoshi MIYAGAWA Kazuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/08/01
Vol. E92-A  No. 8 ; pp. 1795-1807
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: Theory
Keyword: 
hash functionrandom oracle modelstandard modelprovable securityleakage
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Anonymous Identity Based Encryption with Plaintext Awareness in the Two Identities Setting
Changlu LIN Yong LI Qiupu ZHANG Dingfeng YE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/12/01
Vol. E91-A  No. 12 ; pp. 3828-3832
Type of Manuscript:  LETTER
Category: Cryptography and Information Security
Keyword: 
anonymityidentity based encryptionrandom oracle model
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A Note on the Random Oracle Methodology
Mototsugu NISHIOKA Naohisa KOMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/02/01
Vol. E91-A  No. 2 ; pp. 650-663
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
random oracle modelstandard computational modelsignature schemeencryption scheme
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Collision Resistance of Double-Block-Length Hash Function against Free-Start Attack
Shoichi HIROSE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1 ; pp. 74-82
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Hash Functions
Keyword: 
double-block-length hash functionrandom oracle modelideal cipher modelcollision resistancefree-start collision attack
 Summary | Full Text:PDF

Provably Secure Multisignatures in Formal Security Model and Their Optimality
Yuichi KOMANO Kazuo OHTA Atsushi SHIMBO Shinichi KAWAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1 ; pp. 107-118
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Signatures
Keyword: 
multisignaturestrapdoor one-way permutation (TOWP)claw-free permutation (CFP)provably securerandom oracle model
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Provably Secure Untraceable Electronic Cash against Insider Attacks
Yoshikazu HANATANI Yuichi KOMANO Kazuo OHTA Noboru KUNIHIRO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/05/01
Vol. E90-A  No. 5 ; pp. 980-991
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
blind multisignatureelectronic cashprovable securityrandom oracle modelinsider attacks
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Fair Exchange of Signatures with Multiple Signers
Yuichi KOMANO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/05/01
Vol. E90-A  No. 5 ; pp. 969-979
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
fair exchange of signaturesconcurrent signaturesmultisignaturesprovably securerandom oracle model
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Comments on the Security Proofs of Some Signature Schemes Based on Factorization
Wakaha OGATA Naoya MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/02/01
Vol. E90-A  No. 2 ; pp. 526-530
Type of Manuscript:  LETTER
Category: Information Security
Keyword: 
digital signatureRabin-type signaturerandom oracle modelsimulationfactorization
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Toward the Fair Anonymous Signatures: Deniable Ring Signatures
Yuichi KOMANO Kazuo OHTA Atsushi SHIMBO Shinichi KAWAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/01/01
Vol. E90-A  No. 1 ; pp. 54-64
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Signatures
Keyword: 
group signaturesring signaturesDLPCDHDDHrandom oracle model
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A General Model of Structured Multisignatures with Message Flexibility
Dan YAMAMOTO Wakaha OGATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/01/01
Vol. E90-A  No. 1 ; pp. 83-90
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Signatures
Keyword: 
multisignaturesaggregate signaturesbilinear mapsrandom oracle model
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On the Security and the Efficiency of Multi-Signature Schemes Based on a Trapdoor One-Way Permutation
Kei KAWAUCHI Mitsuru TADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/05/01
Vol. E88-A  No. 5 ; pp. 1274-1282
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
multi-signature schemeexact securityrandom oracle model
 Summary | Full Text:PDF

Secure, Efficient and Practical Key Management Scheme in the Complete-Subtree Method
Ryo NOJIMA Yuichi KAJI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/01/01
Vol. E88-A  No. 1 ; pp. 189-194
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Application
Keyword: 
key managementbroadcast encryptioncomplete subtree methodstateless receiverstrapdoor permutationsrandom oracle model
 Summary | Full Text:PDF

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 signatureon-line computationrandom oracle modelprovable security
 Summary | Full Text:PDF

Probabilistic Multi-Signature Schemes Using a One-Way Trapdoor Permutation
Kei KAWAUCHI Yuichi KOMANO Kazuo OHTA Mitsuru TADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/05/01
Vol. E87-A  No. 5 ; pp. 1141-1153
Type of Manuscript:  Special Section LETTER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
multi-signature schemeprobabilistic signature schemeexact securityrandom oracle model
 Summary | Full Text:PDF

k out of n Oblivious Transfer without Random Oracles
Wakaha OGATA Ryota SASAHARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/01/01
Vol. E87-A  No. 1 ; pp. 147-151
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Protocol
Keyword: 
oblivious transfer protocolrandom oracle model
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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 recoveryrandom oracle modelconcrete security analysisprovable securityelliptic curve cryptosystem
 Summary | Full Text:PDF

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: 
indistinguishabilitychosen-plaintext attackadaptive chosen-ciphertext attackrandom oracle model
 Summary | Full Text:PDF

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 signatureFiat-Shamir schemeSchnorr schemerandom oracle modelzero-knowledge interactive proofprovable security
 Summary | Full Text:PDF