Keita Xagawa

According to our database, Keita Xagawa authored at least 52 papers between 2007 and 2024.

Collaborative distances:

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

2024

Quantum Group Actions.

Tomoyuki Morimae, Keita Xagawa

IACR Cryptol. ePrint Arch., 2024

Strong Existential Unforgeability and More of MPC-in-the-Head Signatures.

Mukul Kulkarni, Keita Xagawa

IACR Cryptol. ePrint Arch., 2024

On the Efficiency of Generic, Quantum Cryptographic Constructions.

Keita Xagawa

IACR Commun. Cryptol., 2024

2023

Multiple-Valued Plaintext-Checking Side-Channel Attacks on Post-Quantum KEMs.

Yutaro Tanaka, Rei Ueno, Keita Xagawa, Akira Ito, Junko Takahashi, Naofumi Homma

IACR Trans. Cryptogr. Hardw. Embed. Syst., 2023

Signatures with Memory-Tight Security in the Quantum Random Oracle Model.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2023

Making the Identity-Based Diffie-Hellman Key Exchange Efficiently Revocable.

Kohei Nakagawa, Atsushi Fujioka, Akira Nagai, Junichi Tomida, Keita Xagawa, Kan Yasuda

Proceedings of the Progress in Cryptology - LATINCRYPT 2023, 2023

2022

Curse of Re-encryption: A Generic Power/EM Analysis on Post-Quantum KEMs.

Rei Ueno, Keita Xagawa, Yutaro Tanaka, Akira Ito, Junko Takahashi, Naofumi Homma

IACR Trans. Cryptogr. Hardw. Embed. Syst., 2022

Post-Quantum Anonymity of Kyber.

Varun Maram, Keita Xagawa

IACR Cryptol. ePrint Arch., 2022

Probabilistic Hash-and-Sign with Retry in the Quantum Random Oracle Model.

Haruhisa Kosuge, Keita Xagawa

IACR Cryptol. ePrint Arch., 2022

Cryptanalysis of Boyen's attribute-based encryption scheme in TCC 2013.

Shweta Agrawal, Rajarshi Biswas, Ryo Nishimaki, Keita Xagawa, Xiang Xie, Shota Yamada

Des. Codes Cryptogr., 2022

2021

Fault-Injection Attacks against NIST's Post-Quantum Cryptography Round 3 KEM Candidates.

Keita Xagawa, Akira Ito, Rei Ueno, Junko Takahashi, Naofumi Homma

IACR Cryptol. ePrint Arch., 2021

Anonymity of NIST PQC Round-3 KEMs.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2021

The Boneh-Katz Transformation, Revisited: Pseudorandom/Obliviously-Samplable PKE from Lattices and Codes and Its Application.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2021

2020

Quantum algorithm for the multicollision problem.

Akinori Hosoyamada, Yu Sasaki, Seiichiro Tani, Keita Xagawa

Theor. Comput. Sci., 2020

Non-Committing Encryption with Constant Ciphertext Expansion from Standard Assumptions.

Yusuke Yoshida, Fuyuki Kitagawa, Keita Xagawa, Keisuke Tanaka

IACR Cryptol. ePrint Arch., 2020

Cryptanalysis of a rank-based signature with short public keys.

Nicolas Aragon, Olivier Blazy, Jean-Christophe Deneuville, Philippe Gaborit, Terry Shue Chien Lau, Chik How Tan, Keita Xagawa

Des. Codes Cryptogr., 2020

2019

Cryptanalysis of a New Code-based Signature Scheme with Shorter Public Key in PKC 2019.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2019

Quantum Random Oracle Model with Auxiliary Input.

Minki Hhan, Keita Xagawa, Takashi Yamakawa

IACR Cryptol. ePrint Arch., 2019

Post-Quantum Provably-Secure Authentication and MAC from Mersenne Primes.

Houda Ferradi, Keita Xagawa

IACR Cryptol. ePrint Arch., 2019

ModFalcon: compact signatures based on module NTRU lattices.

Chitchanok Chuengsatiansup, Thomas Prest, Damien Stehlé, Alexandre Wallet, Keita Xagawa

IACR Cryptol. ePrint Arch., 2019

2018

Accumulable optimistic fair exchange from verifiably encrypted homomorphic signatures.

Jae Hong Seo, Keita Emura, Keita Xagawa, Kazuki Yoneyama

Int. J. Inf. Sec., 2018

(Tightly) QCCA-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model.

Keita Xagawa, Takashi Yamakawa

IACR Cryptol. ePrint Arch., 2018

Practical Attack on RaCoSS-R.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2018

Improved Quantum Multicollision-Finding Algorithm.

Akinori Hosoyamada, Yu Sasaki, Seiichiro Tani, Keita Xagawa

IACR Cryptol. ePrint Arch., 2018

Cryptanalysis of Compact-LWE.

Jonathan Bootle, Mehdi Tibouchi, Keita Xagawa

Proceedings of the Topics in Cryptology - CT-RSA 2018, 2018

2017

Practical Cryptanalysis of a Public-key Encryption Scheme Based on Non-linear Indeterminate Equations at SAC 2017.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2017

Tightly-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model.

Tsunekazu Saito, Keita Xagawa, Takashi Yamakawa

IACR Cryptol. ePrint Arch., 2017

Quantum Multicollision-Finding Algorithm.

Akinori Hosoyamada, Yu Sasaki, Keita Xagawa

IACR Cryptol. ePrint Arch., 2017

Cryptanalysis of Comparable Encryption in SIGMOD'16.

Caleb Horst, Ryo Kikuchi, Keita Xagawa

Proceedings of the 2017 ACM International Conference on Management of Data, 2017

2016

Groth-Sahai Proofs Revisited Again: A Bug in "Optimized" Randomization.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2016

Public-Key Cryptosystems Resilient to Continuous Tampering and Leakage of Arbitrary Functions.

Eiichiro Fujisaki, Keita Xagawa

Proceedings of the Advances in Cryptology - ASIACRYPT 2016, 2016

2015

Key-Private Proxy Re-Encryption from Lattices, Revisited.

Ryo Nishimaki, Keita Xagawa

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015

Improved (Hierarchical) Inner-Product Encryption from Lattices.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2015

Note on the RKA security of Continuously Non-Malleable Key-Derivation Function from PKC 2015.

Eiichiro Fujisaki, Keita Xagawa

IACR Cryptol. ePrint Arch., 2015

Re-encryption, functional re-encryption, and multi-hop re-encryption: A framework for achieving obfuscation-based security and instantiations from lattices.

Nishanth Chandran, Melissa Chase, Feng-Hao Liu, Ryo Nishimaki, Keita Xagawa

IACR Cryptol. ePrint Arch., 2015

Verifiably encrypted signatures with short keys based on the decisional linear problem and obfuscation for encrypted VES.

Ryo Nishimaki, Keita Xagawa

Des. Codes Cryptogr., 2015

Strongly secure authenticated key exchange from factoring, codes, and lattices.

Atsushi Fujioka, Koutarou Suzuki, Keita Xagawa, Kazuki Yoneyama

Des. Codes Cryptogr., 2015

Efficient RKA-Secure KEM and IBE Schemes Against Invertible Functions.

Eiichiro Fujisaki, Keita Xagawa

Proceedings of the Progress in Cryptology - LATINCRYPT 2015, 2015

2014

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

Practical Cryptanalysis of a Public-Key Encryption Scheme Based on New Multivariate Quadratic Assumptions.

Martin R. Albrecht, Jean-Charles Faugère, Robert Fitzpatrick, Ludovic Perret, Yosuke Todo, Keita Xagawa

Proceedings of the Public-Key Cryptography - PKC 2014, 2014

2013

Message Authentication Codes Secure against Additively Related-Key Attacks.

Keita Xagawa

IACR Cryptol. ePrint Arch., 2013

Cryptanalysis of the Huang-Liu-Yang Cryptosystem from PKC 2012.

Yosuke Todo, Keita Xagawa

IACR Cryptol. ePrint Arch., 2013

Practical and post-quantum authenticated key exchange from one-way secure key encapsulation mechanism.

Atsushi Fujioka, Koutarou Suzuki, Keita Xagawa, Kazuki Yoneyama

Proceedings of the 8th ACM Symposium on Information, Computer and Communications Security, 2013

2012

Security Enhancement of Identity-Based Identification with Reversibility.

Atsushi Fujioka, Taiichi Saito, Keita Xagawa

Proceedings of the Information and Communications Security - 14th International Conference, 2012

Applicability of OR-Proof Techniques to Hierarchical Identity-Based Identification.

Atsushi Fujioka, Taiichi Saito, Keita Xagawa

Proceedings of the Cryptology and Network Security, 11th International Conference, 2012

Security Enhancements by OR-Proof in Identity-Based Identification.

Atsushi Fujioka, Taiichi Saito, Keita Xagawa

Proceedings of the Applied Cryptography and Network Security, 2012

2010

Security of Encryption Schemes in Weakened Random Oracle Models.

Akinori Kawachi, Akira Numayama, Keisuke Tanaka, Keita Xagawa

IACR Cryptol. ePrint Arch., 2010

2009

Efficient Public Key Encryption Based on Ideal Lattices.

Damien Stehlé, Ron Steinfeld, Keisuke Tanaka, Keita Xagawa

IACR Cryptol. ePrint Arch., 2009

Zero-Knowledge Protocols for NTRU: Application to Identification and Proof of Plaintext Knowledge.

Keita Xagawa, Keisuke Tanaka

Proceedings of the Provable Security, Third International Conference, 2009

2008

Concurrently Secure Identification Schemes Based on the Worst-Case Hardness of Lattice Problems.

Akinori Kawachi, Keisuke Tanaka, Keita Xagawa

Proceedings of the Advances in Cryptology, 2008

2007

Multi-bit Cryptosystems Based on Lattice Problems.

Akinori Kawachi, Keisuke Tanaka, Keita Xagawa

Proceedings of the Public Key Cryptography, 2007