Tatsuaki Okamoto

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74 publications in security and cryptology related venues
Year
Venue
Title
2019
journals/joc
Fully Secure Functional Encryption with a Large Class of Relations from the Decisional Linear Assumption.
Tatsuaki Okamoto Katsuyuki Takashima
2019
conf/pkc
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs.
Pratish Datta Tatsuaki Okamoto Katsuyuki Takashima
2018
conf/pkc
Full-Hiding (Unbounded) Multi-input Inner Product Functional Encryption from the k-Linear Assumption.
Pratish Datta Tatsuaki Okamoto Junichi Tomida
2018
conf/asiacrypt
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption.
Pratish Datta Tatsuaki Okamoto Katsuyuki Takashima
2017
conf/acns
Signature Schemes with Randomized Verification.
Cody Freitag Rishab Goyal Susan Hohenberger Venkata Koppula Eysa Lee Tatsuaki Okamoto Jordan Tran Brent Waters
2015
conf/pkc
Packing Messages and Optimizing Bootstrapping in GSW-FHE.
Ryo Hiromasa Masayuki Abe Tatsuaki Okamoto
2015
conf/asiacrypt
New Realizations of Somewhere Statistically Binding Hashing and Positional Accumulators.
Tatsuaki Okamoto Krzysztof Pietrzak Brent Waters Daniel Wichs
2014
conf/tcc
Constant-Round Black-Box Construction of Composable Multi-Party Computation Protocol.
Susumu Kiyoshima Yoshifumi Manabe Tatsuaki Okamoto
2013
journals/joc
Secure Integration of Asymmetric and Symmetric Encryption Schemes.
Eiichiro Fujisaki Tatsuaki Okamoto
2013
conf/pkc
Decentralized Attribute-Based Signatures.
Tatsuaki Okamoto Katsuyuki Takashima
2012
conf/iwsec
Efficient Concurrent Oblivious Transfer in Super-Polynomial-Simulation Security.
Susumu Kiyoshima Yoshifumi Manabe Tatsuaki Okamoto
2012
conf/eurocrypt
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption.
Tatsuaki Okamoto Katsuyuki Takashima
2012
conf/asiacrypt
Fully Secure Unbounded Inner-Product and Attribute-Based Encryption.
Tatsuaki Okamoto Katsuyuki Takashima
2011
conf/ccs
Leakage resilient eCK-secure key exchange protocol without random oracles.
Daisuke Moriyama Tatsuaki Okamoto
2011
conf/pkc
Efficient Attribute-Based Signatures for Non-monotone Predicates in the Standard Model.
Tatsuaki Okamoto Katsuyuki Takashima
2011
conf/iwsec
A Secure M + 1st Price Auction Protocol Based on Bit Slice Circuits.
Takuho Mitsunaga Yoshifumi Manabe Tatsuaki Okamoto
2011
conf/africacrypt
Some Key Techniques on Pairing Vector Spaces.
Tatsuaki Okamoto Katsuyuki Takashima
2011
conf/cans
Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption.
Tatsuaki Okamoto Katsuyuki Takashima
2010
conf/crypto
Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption.
Tatsuaki Okamoto Katsuyuki Takashima
2010
conf/iwsec
Efficient Secure Auction Protocols Based on the Boneh-Goh-Nissim Encryption.
Takuho Mitsunaga Yoshifumi Manabe Tatsuaki Okamoto
2010
conf/eurocrypt
Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption.
Allison B. Lewko Tatsuaki Okamoto Amit Sahai Katsuyuki Takashima Brent Waters
2009
conf/provsec
An eCK-Secure Authenticated Key Exchange Protocol without Random Oracles.
Daisuke Moriyama Tatsuaki Okamoto
2009
conf/pkc
Compact CCA-Secure Encryption for Messages of Arbitrary Length.
Masayuki Abe Eike Kiltz Tatsuaki Okamoto
2009
conf/asiacrypt
Hierarchical Predicate Encryption for Inner-Products.
Tatsuaki Okamoto Katsuyuki Takashima
2008
conf/fc
An Efficient Anonymous Credential System.
Norio Akagi Yoshifumi Manabe Tatsuaki Okamoto
2008
conf/provsec
Relationship of Three Cryptographic Channels in the UC Framework.
Waka Nagao Yoshifumi Manabe Tatsuaki Okamoto
2008
conf/asiacrypt
Chosen Ciphertext Security with Optimal Ciphertext Overhead.
Masayuki Abe Eike Kiltz Tatsuaki Okamoto
2007
conf/asiacrypt
Authenticated Key Exchange and Key Encapsulation in the Standard Model.
Tatsuaki Okamoto
2006
conf/tcc
Efficient Blind and Partially Blind Signatures Without Random Oracles.
Tatsuaki Okamoto
2005
conf/tcc
A Universally Composable Secure Channel Based on the KEM-DEM Framework.
Waka Nagao Yoshifumi Manabe Tatsuaki Okamoto
2004
journals/joc
RSA-OAEP Is Secure under the RSA Assumption.
Eiichiro Fujisaki Tatsuaki Okamoto David Pointcheval Jacques Stern
2004
conf/pkc
An RSA Family of Trap-Door Permutations with a Common Domain and Its Applications.
Ryotaro Hayashi Tatsuaki Okamoto Keisuke Tanaka
2003
conf/asiacrypt
Almost Uniform Density of Power Residues and the Provable Security of ESIGN.
Tatsuaki Okamoto Jacques Stern
2001
conf/crypto
RSA-OAEP Is Secure under the RSA Assumption.
Eiichiro Fujisaki Tatsuaki Okamoto David Pointcheval Jacques Stern
2001
conf/pkc
The Gap-Problems: A New Class of Problems for the Security of Cryptographic Schemes.
Tatsuaki Okamoto David Pointcheval
2001
conf/ctrsa
REACT: Rapid Enhanced-Security Asymmetric Cryptosystem Transform.
Tatsuaki Okamoto David Pointcheval
2000
conf/crypto
Quantum Public-Key Cryptosystems.
Tatsuaki Okamoto Keisuke Tanaka Shigenori Uchiyama
2000
conf/crypto
Provably Secure Partially Blind Signatures.
Masayuki Abe Tatsuaki Okamoto
1999
conf/crypto
Secure Integration of Asymmetric and Symmetric Encryption Schemes.
Eiichiro Fujisaki Tatsuaki Okamoto
1999
conf/pkc
How to Enhance the Security of Public-Key Encryption at Minimum Cost.
Eiichiro Fujisaki Tatsuaki Okamoto
1999
conf/icics
Delegation Chains Secure up to Constant Length.
Masayuki Abe Tatsuaki Okamoto
1999
conf/asiacrypt
A Signature Scheme with Message Recovery as Secure as Discrete Logarithm.
Masayuki Abe Tatsuaki Okamoto
1998
conf/crypto
On Concrete Security Treatment of Signatures Derived from Identification.
Kazuo Ohta Tatsuaki Okamoto
1998
conf/pkc
Lower Bounds on Term-Based Divisible Cash Systems.
Tatsuaki Okamoto Moti Yung
1998
conf/eurocrypt
Security of an Identity-Based Cryptosystem and the Related Reductions.
Tatsuaki Okamoto Shigenori Uchiyama
1998
conf/eurocrypt
A New Public-Key Cryptosystem as Secure as Factoring.
Tatsuaki Okamoto Shigenori Uchiyama
1998
conf/eurocrypt
A Practical and Provably Secure Scheme for Publicly Verifiable Secret Sharing and Its Applications.
Eiichiro Fujisaki Tatsuaki Okamoto
1997
conf/crypto
Statistical Zero Knowledge Protocols to Prove Modular Polynomial Relations.
Eiichiro Fujisaki Tatsuaki Okamoto
1997
conf/crypto
Keeping the SZK-Verifier Honest Unconditionally.
Giovanni Di Crescenzo Tatsuaki Okamoto Moti Yung
1995
conf/crypto
An Efficient Divisible Electronic Cash Scheme.
Tatsuaki Okamoto
1995
conf/crypto
Honest Verifier vs Dishonest Verifier in Public Coin Zero-Knowledge Proofs.
Ivan Damgård Oded Goldreich Tatsuaki Okamoto Avi Wigderson
1994
conf/ccs
How to Simultaneously Exchange Secrets by General Assumptions.
Tatsuaki Okamoto Kazuo Ohta
1994
conf/crypto
Designated Confirmer Signatures and Public-Key Encryption are Equivalent.
Tatsuaki Okamoto
1994
conf/eurocrypt
Single-Term Divisible Electronic Coins.
Tony L. Eng Tatsuaki Okamoto
1994
conf/asiacrypt
Zero-Knowledge Proofs of Computational Power in the Shared String Model.
Alfredo De Santis Tatsuaki Okamoto Giuseppe Persiano
1993
conf/eurocrypt
On Key Distribution and Authentication in Mobile Radio Networks.
Choonsik Park Kaoru Kurosawa Tatsuaki Okamoto Shigeo Tsujii
1992
conf/crypto
Provably Secure and Practical Identification Schemes and Corresponding Signature Schemes.
Tatsuaki Okamoto
1992
conf/crypto
An Efficient Digital Signature Scheme Based on an Elliptic Curve Over the Ring Z<sub>n</sub>.
Tatsuaki Okamoto Atsushi Fujioka Eiichiro Fujisaki
1992
conf/eurocrypt
How Intractable Is the Discrete Logarithm for a General Finite Group?
Tatsuaki Okamoto Kouichi Sakurai Hiroki Shizuya
1992
conf/eurocrypt
Secure Bit Commitment Function against Divertibility.
Kazuo Ohta Tatsuaki Okamoto Atsushi Fujioka
1992
conf/asiacrypt
A Practical Secret Voting Scheme for Large Scale Elections.
Atsushi Fujioka Tatsuaki Okamoto Kazuo Ohta
1991
conf/crypto
Universal Electronic Cash.
Tatsuaki Okamoto Kazuo Ohta
1991
conf/crypto
Efficient Algorithms for the Construction of Hyperelliptic Cryptosystems.
Tatsuaki Okamoto Kouichi Sakurai
1991
conf/crypto
New Public-Key Schemes Based on Elliptic Curves over the Ring Z<sub>n</sub>.
Kenji Koyama Ueli M. Maurer Tatsuaki Okamoto Scott A. Vanstone
1991
conf/eurocrypt
Interactive Bi-Proof Systems and Undeniable Signature Schemes.
Atsushi Fujioka Tatsuaki Okamoto Kazuo Ohta
1991
conf/eurocrypt
Direct Zero Knowledge Proofs of Computational Power in Five Rounds.
Tatsuaki Okamoto David Chaum Kazuo Ohta
1991
conf/eurocrypt
ESIGN: An Efficient Digital Signature Implementation for Smard Cards.
Atsushi Fujioka Tatsuaki Okamoto Shoji Miyaguchi
1991
conf/asiacrypt
An Extensin of Zero-Knowledge Proofs and Its Applications.
Tatsuaki Okamoto
1991
conf/asiacrypt
A Digital Multisignature Scheme Based on the Fiat-Shamir Scheme.
Kazuo Ohta Tatsuaki Okamoto
1990
conf/crypto
How to Utilize the Randomness of Zero-Knowledge Proofs.
Tatsuaki Okamoto Kazuo Ohta
1990
conf/eurocrypt
Membership Authentication for Hierarchical Multigroups Using the Extended Fiat-Shamir Scheme.
Kazuo Ohta Tatsuaki Okamoto Kenji Koyama
1989
conf/crypto
Disposable Zero-Knowledge Authentications and Their Applications to Untraceable Electronic Cash.
Tatsuaki Okamoto Kazuo Ohta
1989
conf/eurocrypt
Divertible Zero Knowledge Interactive Proofs and Commutative Random Self-Reducibility.
Tatsuaki Okamoto Kazuo Ohta
1988
conf/crypto
A Modification of the Fiat-Shamir Scheme.
Kazuo Ohta Tatsuaki Okamoto

Coauthors

Alfredo De Santis (1)
Allison B. Lewko (1)
Amit Sahai (1)
Atsushi Fujioka (5)
Avi Wigderson (1)
Brent Waters (3)
Choonsik Park (1)
Cody Freitag (1)
Daisuke Moriyama (2)
Daniel Wichs (1)
David Chaum (1)
David Pointcheval (4)
Eiichiro Fujisaki (8)
Eike Kiltz (2)
Eysa Lee (1)
Giovanni Di Crescenzo (1)
Giuseppe Persiano (1)
Hiroki Shizuya (1)
Ivan Damgård (1)
Jacques Stern (3)
Jordan Tran (1)
Junichi Tomida (1)
Kaoru Kurosawa (1)
Katsuyuki Takashima (12)
Kazuo Ohta (13)
Keisuke Tanaka (2)
Kenji Koyama (2)
Kouichi Sakurai (2)
Krzysztof Pietrzak (1)
Masayuki Abe (6)
Moti Yung (2)
Norio Akagi (1)
Oded Goldreich (1)
Pratish Datta (3)
Rishab Goyal (1)
Ryo Hiromasa (1)
Ryotaro Hayashi (1)
Scott A. Vanstone (1)
Shigenori Uchiyama (3)
Shigeo Tsujii (1)
Shoji Miyaguchi (1)
Susan Hohenberger (1)
Susumu Kiyoshima (2)
Takuho Mitsunaga (2)
Tatsuaki Okamoto (74)
Tony L. Eng (1)
Ueli M. Maurer (1)
Venkata Koppula (1)
Waka Nagao (2)
Yoshifumi Manabe (7)
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