Atsushi Takayasu

According to our database, Atsushi Takayasu authored at least 44 papers between 2013 and 2025.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2025

Tight Adaptive Simulation Security for Identity-Based Inner-Product FE in the (Quantum) Random Oracle Model.

Tenma Edamura, Atsushi Takayasu

Proceedings of the Public-Key Cryptography - PKC 2025, 2025

Partial Key Exposure Attacks on UOV and Its Variants.

Yuki Seto, Hiroki Furue, Atsushi Takayasu

Proceedings of the Information Security and Privacy - 30th Australasian Conference, 2025

Efficient Revocable Identity-Based Encryption from Middle-Product LWE.

Takumi Nishimura, Atsushi Takayasu

Proceedings of the Information Security and Privacy - 30th Australasian Conference, 2025

2024

Attribute-Based Keyed Fully Homomorphic Encryption.

Keita Emura, Shingo Sato, Atsushi Takayasu

Proceedings of the Security and Cryptography for Networks - 14th International Conference, 2024

On the Untapped Potential of the Quantum FLT-Based Inversion.

Ren Taguchi, Atsushi Takayasu

Proceedings of the Applied Cryptography and Network Security, 2024

2023

A Generic Construction of CCA-Secure Identity-Based Encryption with Equality Test against Insider Attacks.

Keita Emura, Atsushi Takayasu

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., March, 2023

L1-norm ball for CSIDH: Optimal strategy for choosing the secret key space.

Kohei Nakagawa, Hiroshi Onuki, Atsushi Takayasu, Tsuyoshi Takagi

Discret. Appl. Math., March, 2023

A Lattice Attack on CRYSTALS-Kyber with Correlation Power Analysis.

Yen-Ting Kuo, Atsushi Takayasu

Proceedings of the Information Security and Cryptology - ICISC 2023, 2023

Concrete Quantum Cryptanalysis of Binary Elliptic Curves via Addition Chain.

Ren Taguchi, Atsushi Takayasu

Proceedings of the Topics in Cryptology - CT-RSA 2023, 2023

Memory-Efficient Quantum Information Set Decoding Algorithm.

Naoto Kimura, Atsushi Takayasu, Tsuyoshi Takagi

Proceedings of the Information Security and Privacy - 28th Australasian Conference, 2023

2022

Erratum: A Compact Digital Signature Scheme Based on the Module-LWR Problem [IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Vol. E104.A (2021), No. 9 pp.1219-1234].

Hiroki Okada, Atsushi Takayasu, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsuyoshi Takagi

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022

A Generic Construction of CCA-Secure Attribute-Based Encryption with Equality Test.

Kyoichi Asano, Keita Emura, Atsushi Takayasu, Yohei Watanabe

Proceedings of the Provable and Practical Security, 2022

More Efficient Adaptively Secure Lattice-Based IBE with Equality Test in the Standard Model.

Kyoichi Asano, Keita Emura, Atsushi Takayasu

Proceedings of the Information Security - 25th International Conference, 2022

Keyed-Fully Homomorphic Encryption Without Indistinguishability Obfuscation.

Shingo Sato, Keita Emura, Atsushi Takayasu

Proceedings of the Applied Cryptography and Network Security, 2022

2021

Revocable identity-based encryption with bounded decryption key exposure resistance: Lattice-based construction and more.

Atsushi Takayasu, Yohei Watanabe

Theor. Comput. Sci., 2021

Adaptively Secure Lattice-based Revocable IBE in the QROM: Compact Parameters, Tight Security, and Anonymity.

Atsushi Takayasu

IACR Cryptol. ePrint Arch., 2021

More Efficient Adaptively Secure Revocable Hierarchical Identity-based Encryption with Compact Ciphertexts: Achieving Shorter Keys and Tighter Reductions.

Atsushi Takayasu

IACR Cryptol. ePrint Arch., 2021

Generic Constructions of Revocable Hierarchical Identity-based Encryption.

Keita Emura, Atsushi Takayasu, Yohei Watanabe

IACR Cryptol. ePrint Arch., 2021

Tag-based ABE in prime-order groups via pair encoding.

Atsushi Takayasu

Des. Codes Cryptogr., 2021

2020

Extended partial key exposure attacks on RSA: Improvement up to full size decryption exponents.

Kaichi Suzuki, Atsushi Takayasu, Noboru Kunihiro

Theor. Comput. Sci., 2020

L₁-Norm Ball for CSIDH: Optimal Strategy for Choosing the Secret Key Space.

Kohei Nakagawa, Hiroshi Onuki, Atsushi Takayasu, Tsuyoshi Takagi

IACR Cryptol. ePrint Arch., 2020

Efficient Identity-Based Encryption with Hierarchical Key-Insulation from HIBE.

Keita Emura, Atsushi Takayasu, Yohei Watanabe

IACR Cryptol. ePrint Arch., 2020

Adaptively Secure Revocable Hierarchical IBE from k-linear Assumption.

Keita Emura, Atsushi Takayasu, Yohei Watanabe

IACR Cryptol. ePrint Arch., 2020

Worst case short lattice vector enumeration on block reduced bases of arbitrary blocksizes.

Noboru Kunihiro, Atsushi Takayasu

Discret. Appl. Math., 2020

A Compact Digital Signature Scheme Based on the Module-LWR Problem.

Hiroki Okada, Atsushi Takayasu, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsuyoshi Takagi

Proceedings of the Information and Communications Security - 22nd International Conference, 2020

2019

Generalized cryptanalysis of small CRT-exponent RSA.

Liqiang Peng, Atsushi Takayasu

Theor. Comput. Sci., 2019

Explicit Relation between Low-Dimensional LLL-Reduced Bases and Shortest Vectors.

Kotaro Matsuda, Atsushi Takayasu, Tsuyoshi Takagi

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019

Lattice-Based Revocable (Hierarchical) IBE with Decryption Key Exposure Resistance.

Shuichi Katsumata, Takahiro Matsuda, Atsushi Takayasu

Proceedings of the Public-Key Cryptography - PKC 2019, 2019

Tight Reductions for Diffie-Hellman Variants in the Algebraic Group Model.

Taiga Mizuide, Atsushi Takayasu, Tsuyoshi Takagi

Proceedings of the Topics in Cryptology - CT-RSA 2019, 2019

2018

Estimated Cost for Solving Generalized Learning with Errors Problem via Embedding Techniques.

Weiyao Wang, Yuntao Wang, Atsushi Takayasu, Tsuyoshi Takagi

Proceedings of the Advances in Information and Computer Security, 2018

On the Complexity of the LWR-Solving BKW Algorithm.

Hiroki Okada, Atsushi Takayasu, Kazuhide Fukushima, Shinsaku Kiyomoto, Tsuyoshi Takagi

Proceedings of the Information Security and Cryptology - ICISC 2018, 2018

2017

Small CRT-Exponent RSA Revisited.

Atsushi Takayasu, Yao Lu, Liqiang Peng

Proceedings of the Advances in Cryptology - EUROCRYPT 2017 - 36th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Paris, France, April 30, 2017

A Tool Kit for Partial Key Exposure Attacks on RSA.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Topics in Cryptology - CT-RSA 2017, 2017

Lattice-Based Revocable Identity-Based Encryption with Bounded Decryption Key Exposure Resistance.

Atsushi Takayasu, Yohei Watanabe

Proceedings of the Information Security and Privacy - 22nd Australasian Conference, 2017

2016

How to Generalize RSA Cryptanalyses.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Public-Key Cryptography - PKC 2016, 2016

Partial Key Exposure Attacks on CRT-RSA: General Improvement for the Exposed Least Significant Bits.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Information Security - 19th International Conference, 2016

Small secret exponent attacks on RSA with unbalanced prime factors.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the 2016 International Symposium on Information Theory and Its Applications, 2016

Partial Key Exposure Attacks on RSA with Multiple Exponent Pairs.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Information Security and Privacy - 21st Australasian Conference, 2016

2015

Tighter Security for Efficient Lattice Cryptography via the Rényi Divergence of Optimized Orders.

Katsuyuki Takashima, Atsushi Takayasu

Proceedings of the Provable Security, 2015

Partial Key Exposure Attacks on CRT-RSA: Better Cryptanalysis to Full Size Encryption Exponents.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Applied Cryptography and Network Security, 2015

2014

Partial Key Exposure Attacks on RSA: Achieving the Boneh-Durfee Bound.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Selected Areas in Cryptography - SAC 2014, 2014

General Bounds for Small Inverse Problems and Its Applications to Multi-Prime RSA.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Information Security and Cryptology - ICISC 2014, 2014

Cryptanalysis of RSA with Multiple Small Secret Exponents.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Information Security and Privacy - 19th Australasian Conference, 2014

2013

Better Lattice Constructions for Solving Multivariate Linear Equations Modulo Unknown Divisors.

Atsushi Takayasu, Noboru Kunihiro

Proceedings of the Information Security and Privacy - 18th Australasian Conference, 2013