| 2025 | TCC | Relationships Among FuncCPA and Its Related Notions. | Takumi Shinozaki, Tatsuaki Okamoto, Keisuke Tanaka, Masayuki Tezuka, Yusuke Yoshida |
| 2022 | INDOCRYPT | Stronger Security and Generic Constructions for Adaptor Signatures. | Wei Dai, Tatsuaki Okamoto, Go Yamamoto |
| 2019 | PKC | Efficient Attribute-Based Signatures for Unbounded Arithmetic Branching Programs. | Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima |
| 2018 | ASIACRYPT | Adaptively Simulation-Secure Attribute-Hiding Predicate Encryption. | Pratish Datta, Tatsuaki Okamoto, Katsuyuki Takashima |
| 2018 | PKC | Full-Hiding (Unbounded) Multi-input Inner Product Functional Encryption from the k-Linear Assumption. | Pratish Datta, Tatsuaki Okamoto, Junichi Tomida |
| 2017 | ACNS | Signature Schemes with Randomized Verification. | Cody Freitag, Rishab Goyal, Susan Hohenberger, Venkata Koppula, Eysa Lee, Tatsuaki Okamoto, Jordan Tran, Brent Waters |
| 2015 | ASIACRYPT | New Realizations of Somewhere Statistically Binding Hashing and Positional Accumulators. | Tatsuaki Okamoto, Krzysztof Pietrzak, Brent Waters, Daniel Wichs |
| 2015 | PKC | Packing Messages and Optimizing Bootstrapping in GSW-FHE. | Ryo Hiromasa, Masayuki Abe, Tatsuaki Okamoto |
| 2014 | TCC | Constant-Round Black-Box Construction of Composable Multi-Party Computation Protocol. | Susumu Kiyoshima, Yoshifumi Manabe, Tatsuaki Okamoto |
| 2013 | PKC | Decentralized Attribute-Based Signatures. | Tatsuaki Okamoto, Katsuyuki Takashima |
| 2012 | ASIACRYPT | Fully Secure Unbounded Inner-Product and Attribute-Based Encryption. | Tatsuaki Okamoto, Katsuyuki Takashima |
| 2012 | EuroCrypt | Adaptively Attribute-Hiding (Hierarchical) Inner Product Encryption. | Tatsuaki Okamoto, Katsuyuki Takashima |
| 2012 | IWSEC | Efficient Concurrent Oblivious Transfer in Super-Polynomial-Simulation Security. | Susumu Kiyoshima, Yoshifumi Manabe, Tatsuaki Okamoto |
| 2011 | CANS | Achieving Short Ciphertexts or Short Secret-Keys for Adaptively Secure General Inner-Product Encryption. | Tatsuaki Okamoto, Katsuyuki Takashima |
| 2011 | CCS | Leakage resilient eCK-secure key exchange protocol without random oracles. | Daisuke Moriyama, Tatsuaki Okamoto |
| 2011 | IWSEC | A Secure M + 1st Price Auction Protocol Based on Bit Slice Circuits. | Takuho Mitsunaga, Yoshifumi Manabe, Tatsuaki Okamoto |
| 2011 | PKC | Efficient Attribute-Based Signatures for Non-monotone Predicates in the Standard Model. | Tatsuaki Okamoto, Katsuyuki Takashima |
| 2010 | CRYPTO | Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption. | Tatsuaki Okamoto, Katsuyuki Takashima |
| 2010 | EuroCrypt | Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption. | Allison B. Lewko, Tatsuaki Okamoto, Amit Sahai, Katsuyuki Takashima, Brent Waters |
| 2010 | IWSEC | Efficient Secure Auction Protocols Based on the Boneh-Goh-Nissim Encryption. | Takuho Mitsunaga, Yoshifumi Manabe, Tatsuaki Okamoto |
| 2010 | MFCS | Meta-Envy-Free Cake-Cutting Protocols. | Yoshifumi Manabe, Tatsuaki Okamoto |
| 2009 | ASIACRYPT | Hierarchical Predicate Encryption for Inner-Products. | Tatsuaki Okamoto, Katsuyuki Takashima |
| 2009 | PKC | Compact CCA-Secure Encryption for Messages of Arbitrary Length. | Masayuki Abe, Eike Kiltz, Tatsuaki Okamoto |
| 2009 | ProvSec | An eCK-Secure Authenticated Key Exchange Protocol without Random Oracles. | Daisuke Moriyama, Tatsuaki Okamoto |
| 2008 | ASIACRYPT | Chosen Ciphertext Security with Optimal Ciphertext Overhead. | Masayuki Abe, Eike Kiltz, Tatsuaki Okamoto |
| 2008 | FC | An Efficient Anonymous Credential System. | Norio Akagi, Yoshifumi Manabe, Tatsuaki Okamoto |
| 2008 | Pairing | Homomorphic Encryption and Signatures from Vector Decomposition. | Tatsuaki Okamoto, Katsuyuki Takashima |
| 2008 | ProvSec | Relationship of Three Cryptographic Channels in the UC Framework. | Waka Nagao, Yoshifumi Manabe, Tatsuaki Okamoto |
| 2008 | SecureComm | Anonymous return route information for onion based mix-nets. | Yoshifumi Manabe, Tatsuaki Okamoto |
| 2007 | ASIACRYPT | Authenticated Key Exchange and Key Encapsulation in the Standard Model. | Tatsuaki Okamoto |
| 2006 | TCC | Efficient Blind and Partially Blind Signatures Without Random Oracles. | Tatsuaki Okamoto |
| 2005 | TCC | A Universally Composable Secure Channel Based on the KEM-DEM Framework. | Waka Nagao, Yoshifumi Manabe, Tatsuaki Okamoto |
| 2004 | PKC | An RSA Family of Trap-Door Permutations with a Common Domain and Its Applications. | Ryotaro Hayashi, Tatsuaki Okamoto, Keisuke Tanaka |
| 2003 | ASIACRYPT | Almost Uniform Density of Power Residues and the Provable Security of ESIGN. | Tatsuaki Okamoto, Jacques Stern |
| 2001 | CRYPTO | RSA-OAEP Is Secure under the RSA Assumption. | Eiichiro Fujisaki, Tatsuaki Okamoto, David Pointcheval, Jacques Stern |
| 2001 | PKC | The Gap-Problems: A New Class of Problems for the Security of Cryptographic Schemes. | Tatsuaki Okamoto, David Pointcheval |
| 2000 | CRYPTO | Provably Secure Partially Blind Signatures. | Masayuki Abe, Tatsuaki Okamoto |
| 2000 | CRYPTO | Quantum Public-Key Cryptosystems. | Tatsuaki Okamoto, Keisuke Tanaka, Shigenori Uchiyama |
| 1999 | ASIACRYPT | A Signature Scheme with Message Recovery as Secure as Discrete Logarithm. | Masayuki Abe, Tatsuaki Okamoto |
| 1999 | CRYPTO | Secure Integration of Asymmetric and Symmetric Encryption Schemes. | Eiichiro Fujisaki, Tatsuaki Okamoto |
| 1999 | ICICS | Delegation Chains Secure up to Constant Length. | Masayuki Abe, Tatsuaki Okamoto |
| 1999 | PKC | How to Enhance the Security of Public-Key Encryption at Minimum Cost. | Eiichiro Fujisaki, Tatsuaki Okamoto |
| 1998 | CRYPTO | On Concrete Security Treatment of Signatures Derived from Identification. | Kazuo Ohta, Tatsuaki Okamoto |
| 1998 | EuroCrypt | A Practical and Provably Secure Scheme for Publicly Verifiable Secret Sharing and Its Applications. | Eiichiro Fujisaki, Tatsuaki Okamoto |
| 1998 | EuroCrypt | A New Public-Key Cryptosystem as Secure as Factoring. | Tatsuaki Okamoto, Shigenori Uchiyama |
| 1998 | EuroCrypt | Security of an Identity-Based Cryptosystem and the Related Reductions. | Tatsuaki Okamoto, Shigenori Uchiyama |
| 1998 | PKC | Lower Bounds on Term-Based Divisible Cash Systems. | Tatsuaki Okamoto, Moti Yung |
| 1997 | CRYPTO | Keeping the SZK-Verifier Honest Unconditionally. | Giovanni Di Crescenzo, Tatsuaki Okamoto, Moti Yung |
| 1997 | CRYPTO | Statistical Zero Knowledge Protocols to Prove Modular Polynomial Relations. | Eiichiro Fujisaki, Tatsuaki Okamoto |
| 1996 | STOC | On Relationships between Statistical Zero-Knowledge Proofs. | Tatsuaki Okamoto |
| 1995 | CRYPTO | Honest Verifier vs Dishonest Verifier in Public Coin Zero-Knowledge Proofs. | Ivan Damgrd, Oded Goldreich, Tatsuaki Okamoto, Avi Wigderson |
| 1995 | CRYPTO | An Efficient Divisible Electronic Cash Scheme. | Tatsuaki Okamoto |
| 1994 | ASIACRYPT | Zero-Knowledge Proofs of Computational Power in the Shared String Model. | Alfredo De Santis, Tatsuaki Okamoto, Giuseppe Persiano |
| 1994 | CCS | How to Simultaneously Exchange Secrets by General Assumptions. | Tatsuaki Okamoto, Kazuo Ohta |
| 1994 | CRYPTO | Designated Confirmer Signatures and Public-Key Encryption are Equivalent. | Tatsuaki Okamoto |
| 1994 | EuroCrypt | Single-Term Divisible Electronic Coins. | Tony L. Eng, Tatsuaki Okamoto |
| 1993 | EuroCrypt | On Key Distribution and Authentication in Mobile Radio Networks. | Choonsik Park, Kaoru Kurosawa, Tatsuaki Okamoto, Shigeo Tsujii |
| 1993 | ISAAC | On the Relationship among Cryptographic Physical Assumptions. | Tatsuaki Okamoto |
| 1992 | ASIACRYPT | A Practical Secret Voting Scheme for Large Scale Elections. | Atsushi Fujioka, Tatsuaki Okamoto, Kazuo Ohta |
| 1992 | CRYPTO | Provably Secure and Practical Identification Schemes and Corresponding Signature Schemes. | Tatsuaki Okamoto |
| 1992 | CRYPTO | An Efficient Digital Signature Scheme Based on an Elliptic Curve Over the Ring Z | Tatsuaki Okamoto, Atsushi Fujioka, Eiichiro Fujisaki |
| 1992 | EuroCrypt | Secure Bit Commitment Function against Divertibility. | Kazuo Ohta, Tatsuaki Okamoto, Atsushi Fujioka |
| 1992 | EuroCrypt | How Intractable Is the Discrete Logarithm for a General Finite Group? | Tatsuaki Okamoto, Kouichi Sakurai, Hiroki Shizuya |
| 1991 | ASIACRYPT | A Digital Multisignature Scheme Based on the Fiat-Shamir Scheme. | Kazuo Ohta, Tatsuaki Okamoto |
| 1991 | ASIACRYPT | An Extensin of Zero-Knowledge Proofs and Its Applications. | Tatsuaki Okamoto |
| 1991 | CRYPTO | New Public-Key Schemes Based on Elliptic Curves over the Ring Z | Kenji Koyama, Ueli M. Maurer, Tatsuaki Okamoto, Scott A. Vanstone |
| 1991 | CRYPTO | Universal Electronic Cash. | Tatsuaki Okamoto, Kazuo Ohta |
| 1991 | CRYPTO | Efficient Algorithms for the Construction of Hyperelliptic Cryptosystems. | Tatsuaki Okamoto, Kouichi Sakurai |
| 1991 | EuroCrypt | ESIGN: An Efficient Digital Signature Implementation for Smard Cards. | Atsushi Fujioka, Tatsuaki Okamoto, Shoji Miyaguchi |
| 1991 | EuroCrypt | Interactive Bi-Proof Systems and Undeniable Signature Schemes. | Atsushi Fujioka, Tatsuaki Okamoto, Kazuo Ohta |
| 1991 | EuroCrypt | Direct Zero Knowledge Proofs of Computational Power in Five Rounds. | Tatsuaki Okamoto, David Chaum, Kazuo Ohta |
| 1991 | STOC | Reducing Elliptic Curve Logarithms to Logarithms in a Finite Field | Alfred Menezes, Scott A. Vanstone, Tatsuaki Okamoto |
| 1990 | CRYPTO | How to Utilize the Randomness of Zero-Knowledge Proofs. | Tatsuaki Okamoto, Kazuo Ohta |
| 1990 | EuroCrypt | Membership Authentication for Hierarchical Multigroups Using the Extended Fiat-Shamir Scheme. | Kazuo Ohta, Tatsuaki Okamoto, Kenji Koyama |
| 1989 | CRYPTO | Disposable Zero-Knowledge Authentications and Their Applications to Untraceable Electronic Cash. | Tatsuaki Okamoto, Kazuo Ohta |
| 1989 | EuroCrypt | Divertible Zero Knowledge Interactive Proofs and Commutative Random Self-Reducibility. | Tatsuaki Okamoto, Kazuo Ohta |
| 1988 | CRYPTO | A Modification of the Fiat-Shamir Scheme. | Kazuo Ohta, Tatsuaki Okamoto |