Making Protocol FSU Revocable - Kazuma Wariki; Atsushi Fujioka; Akira Nagai; Kan Yasuda (IACR Cryptol. ePrint Arch., 2025)

k^{m}-Anonymization Meets Differential Privacy Under Sampling - Masaya Kobayashi; Atsushi Fujioka; Koji Chida; Akira Nagai; Kan Yasuda (International Symposium on Information Theory and Its Applications, ISITA 2024, Taipei, Taiwan, November 10-13, 2024, 2024)

Checkable Key Generation and its Application to Hierarchical Identity-Based Signature - Atsushi Fujioka; Takahiro Oshima; Taiichi Saito (International Symposium on Information Theory and Its Applications, ISITA 2024, Taipei, Taiwan, November 10-13, 2024, 2024)

Chameleon Hashing Security Enhancement to Hierarchical Identity-Based Identification - Atsushi Fujioka; Keisuke Saito; Taiichi Saito; Keita Xagawa (International Symposium on Information Theory and Its Applications, ISITA 2024, Taipei, Taiwan, November 10-13, 2024, 2024)

Pk-Anonymization Meets Differential Privacy - Masaya Kobayashi; Atsushi Fujioka; Koji Chida; Akira Nagai; Kan Yasuda (21st Annual International Conference on Privacy, Security and Trust, PST 2024, Sydney, Australia, August 28-30, 2024, 2024)

Making the Identity-Based Diffie-Hellman Key Exchange Efficiently Revocable - Kohei Nakagawa; Atsushi Fujioka; Akira Nagai; Junichi Tomida; Keita Xagawa; Kan Yasuda (Progress in Cryptology - LATINCRYPT 2023 - 8th International Conference on Cryptology and Information Security in Latin America, LATINCRYPT 2023, Quito, Ecuador, October 3-6, 2023, Proceedings, 2023)

Extended k\(^m\)-Anonymity for Randomization Applied to Binary Data - Masaya Kobayashi; Atsushi Fujioka; Koji Chida (20th Annual International Conference on Privacy, Security and Trust, PST 2023, Copenhagen, Denmark, August 21-23, 2023, 2023)

Strongly Secure Identity-Based Key Exchange with Single Pairing Operation - Junichi Tomida; Atsushi Fujioka; Akira Nagai; Koutarou Suzuki (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Revocable Hierarchical Identity-Based Authenticated Key Exchange - Yuki Okano; Junichi Tomida; Akira Nagai; Kazuki Yoneyama; Atsushi Fujioka; Koutarou Suzuki (Information Security and Cryptology - ICISC 2021 - 24th International Conference, Seoul, South Korea, December 1-3, 2021, Revised Selected Papers, 2021)

Foreword - Atsushi Fujioka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Strongly Secure Identity-Based Key Exchange with Single Pairing Operation - Junichi Tomida; Atsushi Fujioka; Akira Nagai; Koutarou Suzuki (Computer Security - ESORICS 2019 - 24th European Symposium on Research in Computer Security, Luxembourg, September 23-27, 2019, Proceedings, Part II, 2019)

One-Round Authenticated Group Key Exchange from Isogenies - Atsushi Fujioka; Katsuyuki Takashima; Kazuki Yoneyama (Provable Security - 13th International Conference, ProvSec 2019, Cairns, QLD, Australia, October 1-4, 2019, Proceedings, 2019)

Supersingular Isogeny Diffie-Hellman Authenticated Key Exchange - Atsushi Fujioka; Katsuyuki Takashima; Shintaro Terada; Kazuki Yoneyama (Information Security and Cryptology - ICISC 2018 - 21st International Conference, Seoul, South Korea, November 28-30, 2018, Revised Selected Papers, 2018)

Single Private-Key Generator Security Implies Multiple Private-Key Generators Security - Atsushi Fujioka; Kazuki Yoneyama (Provable Security - 12th International Conference, ProvSec 2018, Jeju, South Korea, October 25-28, 2018, Proceedings, 2018)

Supersingular Isogeny Diffie-Hellman Authenticated Key Exchange - Atsushi Fujioka; Katsuyuki Takashima; Shintaro Terada; Kazuki Yoneyama (IACR Cryptol. ePrint Arch., 2018)

One-Round Authenticated Group Key Exchange from Isogenies - Atsushi Fujioka; Katsuyuki Takashima; Kazuki Yoneyama (IACR Cryptol. ePrint Arch., 2018)

Adaptive Security in Identity-Based Authenticated Key Agreement with Multiple Private Key Generators - Atsushi Fujioka (Advances in Information and Computer Security - 12th International Workshop on Security, IWSEC 2017, Hiroshima, Japan, August 30 - September 1, 2017, Proceedings, 2017)

One-Round Exposure-Resilient Identity-Based Authenticated Key Agreement with Multiple Private Key Generators - Atsushi Fujioka (Paradigms in Cryptology - Mycrypt 2016. Malicious and Exploratory Cryptology - Second International Conference, Mycrypt 2016, Kuala Lumpur, Malaysia, December 1-2, 2016, Revised Selected Papers, 2016)

Strongly secure authenticated key exchange from factoring, codes, and lattices - Atsushi Fujioka; Koutarou Suzuki; Keita Xagawa; Kazuki Yoneyama (Des. Codes Cryptogr., 2015)

Secure Hierarchical Identity-Based Identification without Random Oracles - Atsushi Fujioka; Taiichi Saito; Keita Xagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

Non-malleable Multiple Public-Key Encryption - Atsushi Fujioka; Eiichiro Fujisaki; Keita Xagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

Generic Construction of Strongly Secure Timed-Release Public-Key Encryption - Atsushi Fujioka; Yoshiaki Okamoto; Taiichi Saito (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Characterization of Strongly Secure Authenticated Key Exchanges without NAXOS Technique - Atsushi Fujioka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

id-eCK Secure ID-Based Authenticated Key Exchange on Symmetric and Asymmetric Pairing - Atsushi Fujioka; Fumitaka Hoshino; Tetsutaro Kobayashi; Koutarou Suzuki; Berkant Ustaoglu; Kazuki Yoneyama (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Practical and post-quantum authenticated key exchange from one-way secure key encapsulation mechanism - Atsushi Fujioka; Koutarou Suzuki; Keita Xagawa; Kazuki Yoneyama (8th ACM Symposium on Information, Computer and Communications Security, ASIA CCS '13, Hangzhou, China - May 08 - 10, 2013, 2013)

Strongly Secure Authenticated Key Exchange without NAXOS' Approach under Computational Diffie-Hellman Assumption - Minkyu Kim; Atsushi Fujioka; Berkant Ustaoglu (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

Strongly Secure Predicate-Based Authenticated Key Exchange: Definition and Constructions - Atsushi Fujioka; Koutarou Suzuki; Kazuki Yoneyama (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

Security of Sequential Multiple Encryption - Atsushi Fujioka; Yoshiaki Okamoto; Taiichi Saito (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

Sufficient Condition for Ephemeral Key-Leakage Resilient Tripartite Key Exchange - Atsushi Fujioka; Mark Manulis; Koutarou Suzuki; Berkant Ustaoglu (Information Security and Privacy - 17th Australasian Conference, ACISP 2012, Wollongong, NSW, Australia, July 9-11, 2012. Proceedings, 2012)

Security Enhancements by OR-Proof in Identity-Based Identification - Atsushi Fujioka; Taiichi Saito; Keita Xagawa (Applied Cryptography and Network Security - 10th International Conference, ACNS 2012, Singapore, June 26-29, 2012. Proceedings, 2012)

Applicability of OR-Proof Techniques to Hierarchical Identity-Based Identification - Atsushi Fujioka; Taiichi Saito; Keita Xagawa (Cryptology and Network Security, 11th International Conference, CANS 2012, Darmstadt, Germany, December 12-14, 2012. Proceedings, 2012)

Security Enhancement of Identity-Based Identification with Reversibility - Atsushi Fujioka; Taiichi Saito; Keita Xagawa (Information and Communications Security - 14th International Conference, ICICS 2012, Hong Kong, China, October 29-31, 2012. Proceedings, 2012)

Secure Hierarchical Identity-Based Identification without Random Oracles - Atsushi Fujioka; Taiichi Saito; Keita Xagawa (Information Security - 15th International Conference, ISC 2012, Passau, Germany, September 19-21, 2012. Proceedings, 2012)

Strongly Secure Authenticated Key Exchange from Factoring, Codes, and Lattices - Atsushi Fujioka; Koutarou Suzuki; Keita Xagawa; Kazuki Yoneyama (Public Key Cryptography - PKC 2012 - 15th International Conference on Practice and Theory in Public Key Cryptography, Darmstadt, Germany, May 21-23, 2012. Proceedings, 2012)

Strongly Secure Authenticated Key Exchange from Factoring, Codes, and Lattices - Atsushi Fujioka; Koutarou Suzuki; Keita Xagawa; Kazuki Yoneyama (IACR Cryptol. ePrint Arch., 2012)

Hierarchical ID-Based Authenticated Key Exchange Resilient to Ephemeral Key Leakage - Atsushi Fujioka; Koutarou Suzuki; Kazuki Yoneyama (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

Generic Construction of Strongly Secure Timed-Release Public-Key Encryption - Atsushi Fujioka; Yoshiaki Okamoto; Taiichi Saito (Information Security and Privacy - 16th Australasian Conference, ACISP 2011, Melbourne, Australia, July 11-13, 2011. Proceedings, 2011)

Designing Efficient Authenticated Key Exchange Resilient to Leakage of Ephemeral Secret Keys - Atsushi Fujioka; Koutarou Suzuki (Topics in Cryptology - CT-RSA 2011 - The Cryptographers' Track at the RSA Conference 2011, San Francisco, CA, USA, February 14-18, 2011. Proceedings, 2011)

Strong Security Notions for Timed-Release Public-Key Encryption Revisited - Ryo Kikuchi; Atsushi Fujioka; Yoshiaki Okamoto; Taiichi Saito (Information Security and Cryptology - ICISC 2011 - 14th International Conference, Seoul, Korea, November 30 - December 2, 2011. Revised Selected Papers, 2011)

Sufficient Condition for Identity-Based Authenticated Key Exchange Resilient to Leakage of Secret Keys - Atsushi Fujioka; Koutarou Suzuki (Information Security and Cryptology - ICISC 2011 - 14th International Conference, Seoul, Korea, November 30 - December 2, 2011. Revised Selected Papers, 2011)

Characterization of Strongly Secure Authenticated Key Exchanges without NAXOS Technique - Atsushi Fujioka (Advances in Information and Computer Security - 6th International Workshop, IWSEC 2011, Tokyo, Japan, November 8-10, 2011. Proceedings, 2011)

Hierarchical ID-Based Authenticated Key Exchange Resilient to Ephemeral Key Leakage - Atsushi Fujioka; Koutarou Suzuki; Kazuki Yoneyama (Advances in Information and Computer Security - 5th International Workshop on Security, IWSEC 2010, Kobe, Japan, November 22-24, 2010. Proceedings, 2010)

Security of Sequential Multiple Encryption - Atsushi Fujioka; Yoshiaki Okamoto; Taiichi Saito (Progress in Cryptology - LATINCRYPT 2010, First International Conference on Cryptology and Information Security in Latin America, Puebla, Mexico, August 8-11, 2010, Proceedings, 2010)

Ephemeral Key Leakage Resilient and Efficient ID-AKEs That Can Share Identities, Private and Master Keys - Atsushi Fujioka; Koutarou Suzuki; Berkant Ustaoglu (Pairing-Based Cryptography - Pairing 2010 - 4th International Conference, Yamanaka Hot Spring, Japan, December 2010. Proceedings, 2010)

Predicate-Based Authenticated Key Exchange Resilient to Ephemeral Key Leakage - Atsushi Fujioka; Koutarou Suzuki; Kazuki Yoneyama (Information Security Applications - 11th International Workshop, WISA 2010, Jeju Island, Korea, August 24-26, 2010, Revised Selected Papers, 2010)

Strongly Secure Authenticated Key Exchange without NAXOS' Approach - Minkyu Kim; Atsushi Fujioka; Berkant Ustaoglu (Advances in Information and Computer Security, 4th International Workshop on Security, IWSEC 2009, Toyama, Japan, October 28-30, 2009, Proceedings, 2009)

Utilizing postponed ephemeral and pseudo-static keys in tripartite and identity-based key agreement protocols - Atsushi Fujioka; Koutarou Suzuki; Berkant Ustaoglu (IACR Cryptol. ePrint Arch., 2009)

Forward-Secure Authenticated-Encryption in Multi-Receiver Setting - Kan Yasuda; Kazumaro Aoki; Eiichiro Fujisaki; Atsushi Fujioka (SECRYPT 2006, Proceedings of the International Conference on Security and Cryptography, Setúbal, Portugal, August 7-10, 2006, SECRYPT is part of ICETE - The International Joint Conference on e-Business and Telecommunications, 2006)

An Improvement on a Practical Secret Voting Scheme - Miyako Ohkubo; Fumiaki Miura; Masayuki Abe; Atsushi Fujioka; Tatsuaki Okamoto (Information Security, Second International Workshop, ISW'99, Kuala Lumpur, Malaysia, November 1999, Proceedings, 1999)

A Practical Secret Voting Scheme for Large Scale Elections - Atsushi Fujioka; Tatsuaki Okamoto; Kazuo Ohta (Advances in Cryptology - AUSCRYPT '92, Workshop on the Theory and Application of Cryptographic Techniques, Gold Coast, Queensland, Australia, December 13-16, 1992, Proceedings, 1992)

An Efficient Digital Signature Scheme Based on an Elliptic Curve Over the Ring Z\(_n\) - Tatsuaki Okamoto; Atsushi Fujioka; Eiichiro Fujisaki (Advances in Cryptology - CRYPTO '92, 12th Annual International Cryptology Conference, Santa Barbara, California, USA, August 16-20, 1992, Proceedings, 1992)

Secure Bit Commitment Function against Divertibility - Kazuo Ohta; Tatsuaki Okamoto; Atsushi Fujioka (Advances in Cryptology - EUROCRYPT '92, Workshop on the Theory and Application of of Cryptographic Techniques, Balatonfüred, Hungary, May 24-28, 1992, Proceedings, 1992)

Provably Secure Key-Updating Schemes in Identity-Based Systems - Shinji Shinozaki; Atsushi Fujioka; Shigeo Tsujii; Toshiya Itoh (J. Circuits Syst. Comput., 1991)

Interactive Bi-Proof Systems and Undeniable Signature Schemes - Atsushi Fujioka; Tatsuaki Okamoto; Kazuo Ohta (Advances in Cryptology - EUROCRYPT '91, Workshop on the Theory and Application of of Cryptographic Techniques, Brighton, UK, April 8-11, 1991, Proceedings, 1991)

ESIGN: An Efficient Digital Signature Implementation for Smard Cards - Atsushi Fujioka; Tatsuaki Okamoto; Shoji Miyaguchi (Advances in Cryptology - EUROCRYPT '91, Workshop on the Theory and Application of of Cryptographic Techniques, Brighton, UK, April 8-11, 1991, Proceedings, 1991)

Provably Secure Key-Updating Schemes in Identity-Based Systems - Shinji Shinozaki; Toshiya Itoh; Atsushi Fujioka; Shigeo Tsujii (Advances in Cryptology - EUROCRYPT '90, Workshop on the Theory and Application of of Cryptographic Techniques, Aarhus, Denmark, May 21-24, 1990, Proceedings, 1990)

A public-key cryptosystem based on the difficulty of solving a system of nonlinear equations - Shigeo Tsujii; Toshiya Itoh; Atsushi Fujioka; Kaoru Kurosawa; Tsutomu Matsumoto (Syst. Comput. Jpn., 1988)