Tatsuaki Okamoto

ORCID

Publication Activity (10 Years)

Years Active: 1986-2022
Publications (10 Years): 22

Top Venues

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.

IACR Cryptol. ePrint Arch.

Des. Codes Cryptogr.

CoRR

Publications

Tatsuaki Okamoto
A New Quantitative Definition of the Complexity of Organized Matters. Complex. 2022 (2022)
Wei Dai, Tatsuaki Okamoto, Go Yamamoto
Stronger Security and Generic Constructions for Adaptor Signatures. IACR Cryptol. ePrint Arch. 2022 (2022)
Wei Dai, Tatsuaki Okamoto, Go Yamamoto
Stronger Security and Generic Constructions for Adaptor Signatures. INDOCRYPT (2022)
Janaka Alawatugoda, Tatsuaki Okamoto
Standard model leakage-resilient authenticated key exchange using inner-product extractors. Des. Codes Cryptogr. 90 (4) (2022)
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2021)
Janaka Alawatugoda, Tatsuaki Okamoto
Standard Model Leakage-Resilient Authenticated Key Exchange using Inner-product Extractors. IACR Cryptol. ePrint Arch. 2021 (2021)
Junichi Tomida, Masayuki Abe, Tatsuaki Okamoto
Efficient Inner Product Functional Encryption with Full-Hiding Security. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2020)
Tatsuaki Okamoto, Katsuyuki Takashima
Decentralized Attribute-Based Encryption and Signatures. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2020)
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption. IEICE Trans. Inf. Syst. (7) (2020)
Tatsuaki Okamoto, Katsuyuki Takashima
Fully Secure Functional Encryption with a Large Class of Relations from the Decisional Linear Assumption. J. Cryptol. 32 (4) (2019)
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs. Public Key Cryptography (1) (2019)
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs. IACR Cryptol. ePrint Arch. 2019 (2019)
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption. ASIACRYPT (2) (2018)
Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima
Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption. IACR Cryptol. ePrint Arch. 2018 (2018)
Pratish Datta, Tatsuaki Okamoto, Junichi Tomida
Full-Hiding (Unbounded) Multi-input Inner Product Functional Encryption from the k-Linear Assumption. Public Key Cryptography (2) (2018)
Pratish Datta, Tatsuaki Okamoto, Junichi Tomida
Full-Hiding (Unbounded) Multi-Input Inner Product Functional Encryption from the k-Linear Assumption. IACR Cryptol. ePrint Arch. 2018 (2018)
Cody Freitag, Rishab Goyal, Susan Hohenberger, Venkata Koppula, Eysa Lee, Tatsuaki Okamoto, Jordan Tran, Brent Waters
Signature Schemes with Randomized Verification. ACNS (2017)
Tatsuaki Okamoto, Katsuyuki Takashima
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2016)
Takuho Mitsunaga, Yoshifumi Manabe, Tatsuaki Okamoto
A Secure M + 1st Price Auction Protocol Based on Bit Slice Circuits. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (8) (2016)
Junichi Tomida, Masayuki Abe, Tatsuaki Okamoto
Efficient Functional Encryption for Inner-Product Values with Full-Hiding Security. ISC (2016)
Tatsuaki Okamoto
A Unified Paradigm of Organized Complexity and Semantic Information Theory. CoRR (2016)
Ryo Hiromasa, Masayuki Abe, Tatsuaki Okamoto
Packing Messages and Optimizing Bootstrapping in GSW-FHE. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2016)
Tatsuaki Okamoto, Katsuyuki Takashima
Achieving short ciphertexts or short secret-keys for adaptively secure general inner-product encryption. Des. Codes Cryptogr. 77 (2-3) (2015)
Ryo Hiromasa, Masayuki Abe, Tatsuaki Okamoto
Packing Messages and Optimizing Bootstrapping in GSW-FHE. Public Key Cryptography (2015)
Tatsuaki Okamoto, Krzysztof Pietrzak, Brent Waters, Daniel Wichs
New Realizations of Somewhere Statistically Binding Hashing and Positional Accumulators. ASIACRYPT (1) (2015)
Tatsuaki Okamoto, Krzysztof Pietrzak, Brent Waters, Daniel Wichs
New Realizations of Somewhere Statistically Binding Hashing and Positional Accumulators. IACR Cryptol. ePrint Arch. 2015 (2015)
Tatsuaki Okamoto, Katsuyuki Takashima
Dual Pairing Vector Spaces and Their Applications. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2015)
Yoshifumi Manabe, Risako Otsuka, Tatsuaki Okamoto
A Cryptographic Moving-Knife Cake-Cutting Protocol with High Social Surplus. J. Inf. Process. 23 (3) (2015)
Susumu Kiyoshima, Yoshifumi Manabe, Tatsuaki Okamoto
Constant-Round Black-Box Construction of Composable Multi-Party Computation Protocol. TCC (2014)
Tatsuaki Okamoto, Katsuyuki Takashima
Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model. IEEE Trans. Cloud Comput. 2 (4) (2014)
Takuho Mitsunaga, Yoshifumi Manabe, Tatsuaki Okamoto
Efficient Secure Auction Protocols Based on the Boneh-Goh-Nissim Encryption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2013)
Tatsuaki Okamoto, Katsuyuki Takashima
Decentralized Attribute-Based Signatures. Public Key Cryptography (2013)
Susumu Kiyoshima, Yoshifumi Manabe, Tatsuaki Okamoto
Constant-Round Black-Box Construction of Composable Multi-Party Computation Protocol. IACR Cryptol. ePrint Arch. 2013 (2013)
Eiichiro Fujisaki, Tatsuaki Okamoto
Secure Integration of Asymmetric and Symmetric Encryption Schemes. J. Cryptol. 26 (1) (2013)
Masayuki Abe, Tatsuaki Okamoto, Koutarou Suzuki
Message Recovery Signature Schemes from Sigma-Protocols. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2013)
Tatsuaki Okamoto, Katsuyuki Takashima
Efficient (Hierarchical) Inner-Product Encryption Tightly Reduced from the Decisional Linear Assumption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2013)
Yoshifumi Manabe, Tatsuaki Okamoto
A Cryptographic Moving-Knife Cake-Cutting Protocol IWIGP (2012)
Yoshifumi Manabe, Tatsuaki Okamoto
Meta-envy-free Cake-cutting and Pie-cutting Protocols. Inf. Media Technol. 7 (3) (2012)
Susumu Kiyoshima, Yoshifumi Manabe, Tatsuaki Okamoto
Efficient Concurrent Oblivious Transfer in Super-Polynomial-Simulation Security. IWSEC (2012)
Yoshifumi Manabe, Tatsuaki Okamoto
Meta-envy-free Cake-cutting and Pie-cutting Protocols. J. Inf. Process. 20 (3) (2012)
Tatsuaki Okamoto, Katsuyuki Takashima
Fully Secure Unbounded Inner-Product and Attribute-Based Encryption. IACR Cryptol. ePrint Arch. 2012 (2012)
Tatsuaki Okamoto, Katsuyuki Takashima
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption. EUROCRYPT (2012)
Tatsuaki Okamoto, Katsuyuki Takashima
Fully Secure Unbounded Inner-Product and Attribute-Based Encryption. ASIACRYPT (2012)
Daisuke Moriyama, Tatsuaki Okamoto
An eCK-secure Authenticated Key Exchange Protocol without Random Oracles. KSII Trans. Internet Inf. Syst. 5 (3) (2011)
Tatsuaki Okamoto, Katsuyuki Takashima
Some Key Techniques on Pairing Vector Spaces. AFRICACRYPT (2011)
Tatsuaki Okamoto, Katsuyuki Takashima
Efficient Attribute-Based Signatures for Non-monotone Predicates in the Standard Model. Public Key Cryptography (2011)
Tatsuaki Okamoto, Katsuyuki Takashima
Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption. IACR Cryptol. ePrint Arch. 2011 (2011)
Tatsuaki Okamoto, Katsuyuki Takashima
Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption. CANS (2011)
Tatsuaki Okamoto, Katsuyuki Takashima
Decentralized Attribute-Based Signatures. IACR Cryptol. ePrint Arch. 2011 (2011)
Tatsuaki Okamoto, Katsuyuki Takashima
Efficient Attribute-Based Signatures for Non-Monotone Predicates in the Standard Model. IACR Cryptol. ePrint Arch. 2011 (2011)
Daisuke Moriyama, Tatsuaki Okamoto
Leakage resilient eCK-secure key exchange protocol without random oracles. AsiaCCS (2011)
Takuho Mitsunaga, Yoshifumi Manabe, Tatsuaki Okamoto
A Secure M + 1st Price Auction Protocol Based on Bit Slice Circuits. IWSEC (2011)
Tatsuaki Okamoto, Katsuyuki Takashima
Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption. IACR Cryptol. ePrint Arch. 2011 (2011)
Tatsuaki Okamoto, Katsuyuki Takashima
Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption. CRYPTO (2010)
Tatsuaki Okamoto, Katsuyuki Takashima
Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption. IACR Cryptol. ePrint Arch. 2010 (2010)
Takuho Mitsunaga, Yoshifumi Manabe, Tatsuaki Okamoto
Efficient Secure Auction Protocols Based on the Boneh-Goh-Nissim Encryption. IWSEC (2010)
Yoshifumi Manabe, Tatsuaki Okamoto
Meta-Envy-Free Cake-Cutting Protocols. MFCS (2010)
Masayuki Abe, Eike Kiltz, Tatsuaki Okamoto
Chosen Ciphertext Security with Optimal Ciphertext Overhead. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2010)
Allison B. Lewko, Tatsuaki Okamoto, Amit Sahai, Katsuyuki Takashima, Brent Waters
Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption. IACR Cryptol. ePrint Arch. 2010 (2010)
Allison B. Lewko, Tatsuaki Okamoto, Amit Sahai, Katsuyuki Takashima, Brent Waters
Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption. EUROCRYPT (2010)
Masayuki Abe, Eike Kiltz, Tatsuaki Okamoto
Compact CCA-Secure Encryption for Messages of Arbitrary Length. Public Key Cryptography (2009)
Tatsuaki Okamoto, Katsuyuki Takashima
Hierarchical Predicate Encryption for Inner-Products. ASIACRYPT (2009)
Daisuke Moriyama, Tatsuaki Okamoto
An eCK-Secure Authenticated Key Exchange Protocol without Random Oracles. ProvSec (2009)
Masayuki Abe, Eike Kiltz, Tatsuaki Okamoto
Chosen Ciphertext Security with Optimal Ciphertext Overhead. ASIACRYPT (2008)
Norio Akagi, Yoshifumi Manabe, Tatsuaki Okamoto
An Efficient Anonymous Credential System. Financial Cryptography (2008)
Waka Nagao, Yoshifumi Manabe, Tatsuaki Okamoto
Relationship of Three Cryptographic Channels in the UC Framework. ProvSec (2008)
Yusuke Okada, Yoshifumi Manabe, Tatsuaki Okamoto
An optimistic fair exchange protocol and its security in the universal composability framework. Int. J. Appl. Cryptogr. 1 (1) (2008)
Yoshifumi Manabe, Tatsuaki Okamoto
Anonymous return route information for onion based mix-nets. SecureComm (2008)
Ryo Nishimaki, Yoshifumi Manabe, Tatsuaki Okamoto
Universally Composable Identity-Based Encryption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2008)
Waka Nagao, Yoshifumi Manabe, Tatsuaki Okamoto
On the Equivalence of Several Security Notions of KEM and DEM. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2008)
Tatsuaki Okamoto, Katsuyuki Takashima
Homomorphic Encryption and Signatures from Vector Decomposition. Pairing (2008)
Masayuki Abe, Eike Kiltz, Tatsuaki Okamoto
Chosen Ciphertext Security with Optimal Ciphertext Overhead. IACR Cryptol. ePrint Arch. 2008 (2008)
Tatsuaki Okamoto
Authenticated Key Exchange and Key Encapsulation Without Random Oracles. IACR Cryptol. ePrint Arch. 2007 (2007)
Tatsuaki Okamoto
Authenticated Key Exchange and Key Encapsulation in the Standard Model. ASIACRYPT (2007)
Tatsuaki Okamoto
Efficient Blind and Partially Blind Signatures Without Random Oracles. IACR Cryptol. ePrint Arch. 2006 (2006)
Waka Nagao, Yoshifumi Manabe, Tatsuaki Okamoto
On the Equivalence of Several Security Notions of Key Encapsulation Mechanism. IACR Cryptol. ePrint Arch. 2006 (2006)
Tatsuaki Okamoto
Efficient Blind and Partially Blind Signatures Without Random Oracles. TCC (2006)
Waka Nagao, Yoshifumi Manabe, Tatsuaki Okamoto
A Universally Composable Secure Channel Based on the KEM-DEM Framework. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2006)
Ryo Nishimaki, Yoshifumi Manabe, Tatsuaki Okamoto
Universally Composable Identity-Based Encryption. VIETCRYPT (2006)
Tatsuaki Okamoto
Cryptography Based on Bilinear Maps. AAECC (2006)
Tatsuaki Okamoto
On Pairing-Based Cryptosystems. VIETCRYPT (2006)
Tatsuaki Okamoto
Relationship of three cryptographic channels in the UC framework. ICITS (2005)
Chung-Huang Yang, Hikaru Morita, Tatsuaki Okamoto
Security and Performance Evaluation of ESIGN and RSA on IC Cards by Using Byte-Unit Modular Algorithms. IEICE Trans. Commun. (3) (2005)
Tatsuaki Okamoto, Ryo Kashima
Resource Bounded Unprovability of Computational Lower Bounds CoRR (2005)
Waka Nagao, Yoshifumi Manabe, Tatsuaki Okamoto
A Universally Composable Secure Channel Based on the KEM-DEM Framework. TCC (2005)
Ryotaro Hayashi, Tatsuaki Okamoto, Keisuke Tanaka
An RSA Family of Trap-Door Permutations with a Common Domain and Its Applications. Public Key Cryptography (2004)
Eiichiro Fujisaki, Tatsuaki Okamoto, David Pointcheval, Jacques Stern
RSA-OAEP Is Secure under the RSA Assumption. J. Cryptol. 17 (2) (2004)
Tatsuaki Okamoto, Jacques Stern
Almost Uniform Density of Power Residues and the Provable Security of ESIGN. ASIACRYPT (2003)
Tatsuaki Okamoto, Ryo Kashima
Resource Bounded Unprovability of Computational Lower Bounds. IACR Cryptol. ePrint Arch. 2003 (2003)
Masayuki Abe, Tatsuaki Okamoto
Delegation Chains Secure up to Constant Length. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2002)
Tatsuaki Okamoto, David Pointcheval
The Gap-Problems: A New Class of Problems for the Security of Cryptographic Schemes. Public Key Cryptography (2001)
Tatsuaki Okamoto, David Pointcheval
REACT: Rapid Enhanced-Security Asymmetric Cryptosystem Transform. CT-RSA (2001)
Eiichiro Fujisaki, Tatsuaki Okamoto, David Pointcheval, Jacques Stern
RSA-OAEP Is Secure under the RSA Assumption. CRYPTO (2001)
Masayuki Abe, Tatsuaki Okamoto
Provably Secure Partially Blind Signatures. CRYPTO (2000)
Tatsuaki Okamoto
On Relationships between Statistical Zero-Knowledge Proofs. J. Comput. Syst. Sci. 60 (1) (2000)
Eiichiro Fujisaki, Tatsuaki Okamoto, David Pointcheval, Jacques Stern
RSA-OAEP is Secure under the RSA Assumption. IACR Cryptol. ePrint Arch. 2000 (2000)
Tatsuaki Okamoto, Keisuke Tanaka, Shigenori Uchiyama
Quantum Public-Key Cryptosystems. CRYPTO (2000)
Miyako Ohkubo, Fumiaki Miura, Masayuki Abe, Atsushi Fujioka, Tatsuaki Okamoto
An Improvement on a Practical Secret Voting Scheme. ISW (1999)
Eiichiro Fujisaki, Tatsuaki Okamoto
How to Enhance the Security of Public-Key Encryption at Minimum Cost. Public Key Cryptography (1999)
Masayuki Abe, Tatsuaki Okamoto
Delegation Chains Secure up to Constant Length. ICICS (1999)

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Publication Activity (10 Years)

Top Topics

Top Venues

Tatsuaki Okamoto