A Proposal of an Associating Image-Based Password Creating Method and a Development of a Password Creating Support System. - Masayuki Fukumitsu; Takashi Katoh; Bhed Bahadur Bista; Toyoo Takata (AINA, 2010)

Toward Separating the Strong Adaptive Pseudo-freeness from the Strong RSA Assumption. - Masayuki Fukumitsu; Shingo Hasegawa; Shuji Isobe; Eisuke Koizumi; Hiroki Shizuya (ACISP, 2013)

On the Impossibility of Proving Security of Strong-RSA Signatures via the RSA Assumption. - Masayuki Fukumitsu; Shingo Hasegawa; Shuji Isobe; Hiroki Shizuya (ACISP, 2014)

The RSA Group Is Adaptive Pseudo-Free under the RSA Assumption. - Masayuki Fukumitsu; Shingo Hasegawa; Shuji Isobe; Hiroki Shizuya (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

A Proposal of a Password Manager Satisfying Security and Usability by Using the Secret Sharing and a Personal Server. - Masayuki Fukumitsu; Shingo Hasegawa; Jun-ya Iwazaki; Masao Sakai; Daiki Takahashi (AINA, 2016)

A generic construction of tight security signatures in the non-programmable random oracle model. - Masayuki Fukumitsu; Shingo Hasegawa (ISITA, 2016)

Impossibility on the Provable Security of the Fiat-Shamir-Type Signatures in the Non-programmable Random Oracle Model. - Masayuki Fukumitsu; Shingo Hasegawa (ISC, 2016)

A Proposal of a Secure P2P-Type Storage Scheme by Using the Secret Sharing and the Blockchain. - Masayuki Fukumitsu; Shingo Hasegawa; Jun-ya Iwazaki; Masao Sakai; Daiki Takahashi (AINA, 2017)

A Galindo-Garcia-Like Identity-Based Signature with Tight Security Reduction. - Masayuki Fukumitsu; Shingo Hasegawa (CANDAR, 2017)

A Method for Constructing an Autonomous Decentralized P2P Storage with High Confidentiality and Reliability. - Masayuki Fukumitsu; Shingo Hasegawa; Shuji Isobe; Jun-ya Iwazaki; Eisuke Koizumi; Masao Sakai (CANDAR, 2017)

Impossibility of the Provable Security of the Schnorr Signature from the One-More DL Assumption in the Non-programmable Random Oracle Model. - Masayuki Fukumitsu; Shingo Hasegawa (ProvSec, 2017)

A Galindo-Garcia-Like Identity-Based Signature with Tight Security Reduction, Revisited. - Masayuki Fukumitsu; Shingo Hasegawa (CANDAR, 2018)

A Generic Construction of an Identity-based Signature from a Sigma Protocol. - Masayuki Fukumitsu; Shingo Hasegawa (ISITA, 2018)

Black-Box Separations on Fiat-Shamir-Type Signatures in the Non-Programmable Random Oracle Model. - Masayuki Fukumitsu; Shingo Hasegawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018)

A Tightly-Secure Lattice-Based Multisignature. - Masayuki Fukumitsu; Shingo Hasegawa (APKC@AsiaCCS, 2019)

Linear Lossy Identification Scheme derives Tightly-Secure Multisignature. - Masayuki Fukumitsu; Shingo Hasegawa (AsiaJCIS, 2020)

One-More Assumptions Do Not Help Fiat-Shamir-type Signature Schemes in NPROM. - Masayuki Fukumitsu; Shingo Hasegawa (CT-RSA, 2020)

Group Signatures with Designated Traceability. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (CANDAR, 2021)

An Aggregate Signature with Pre-communication in the Plain Public Key Model. - Masayuki Fukumitsu; Shingo Hasegawa (STM, 2021)

A Lattice-based Provably Secure Multisignature Scheme in Quantum Random Oracle Model. - Masayuki Fukumitsu; Shingo Hasegawa (IACR Cryptol. ePrint Arch., 2021)

Impossibility on the Schnorr Signature from the One-More DL Assumption in the Non-Programmable Random Oracle Model. - Masayuki Fukumitsu; Shingo Hasegawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Tighter Reduction for Lattice-Based Multisignature. - Masayuki Fukumitsu; Shingo Hasegawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

A Tightly Secure DDH-based Multisignature with Public-Key Aggregation. - Masayuki Fukumitsu; Shingo Hasegawa (Int. J. Netw. Comput., 2021)

Group Signatures with Equality Test on Signers. - Kyoya Anzai; Masayuki Fukumitsu; Hiroaki Anada; Shingo Hasegawa (CANDARW, 2022)

Group Signatures with Designated Traceability over Openers' Attributes in Bilinear Groups. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (WISA, 2022)

Group Signatures with Designated Traceability over Openers' Attributes. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (Int. J. Netw. Comput., 2022)

Accountable Ring Signatures from Symmetric-Key Primitives. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (candar, 2023)

Emergency Button: Evacuation of Crypto Asset When Key Loss. - Natsume Matsuzaki; Masayuki Fukumitsu; Yoshihiro Kita (CANDARW, 2023)

Dynamic Group Signatures with Message Dependent Opening and Non-Interactive Signing. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (Int. J. Netw. Comput., 2023)

On Multi-user Security of Schnorr Signature in Algebraic Group Model. - Masayuki Fukumitsu; Shingo Hasegawa (Int. J. Netw. Comput., 2023)

Group Signatures with Designated Traceability over Openers' Attributes from Lattices. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (CANDAR, 2024)

Tightly Secure Lattice-Based Synchronized Aggregate Signature in Standard Model. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (ICISC, 2024)

Group Signatures with Designated Traceability over Openers' Attributes from Symmetric-Key Primitives. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (PST, 2024)

On Multi-user Security of Lattice-based Signature under Adaptive Corruptions and Key Leakages. - Masayuki Fukumitsu; Shingo Hasegawa (IACR Cryptol. ePrint Arch., 2024)

Efficient Group Signatures with Designated Traceability over Openers' Attributes from Lattices. - Hiroaki Anada; Masayuki Fukumitsu; Shingo Hasegawa (Int. J. Netw. Comput., 2025)