Noboru Kunihiro

According to our database, Noboru Kunihiro authored at least 141 papers between 1998 and 2023.

Collaborative distances:

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

2023

Multiplicative and verifiably multiplicative secret sharing for multipartite adversary structures.

Reo Eriguchi, Noboru Kunihiro, Koji Nuida

Des. Codes Cryptogr., May, 2023

Linear Algebraic Approach to Strongly Secure Ramp Secret Sharing for General Access Structures with Application to Symmetric PIR.

Reo Eriguchi, Noboru Kunihiro, Koji Nuida

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

Estimation of Shor's Circuit for 2048-bit Integers based on Quantum Simulator.

Junpei Yamaguchi, Masafumi Yamazaki, Akihiro Tabuchi, Takumi Honda, Tetsuya Izu, Noboru Kunihiro

IACR Cryptol. ePrint Arch., 2023

Experiments and Resource Analysis of Shor's Factorization Using a Quantum Simulator.

Junpei Yamaguchi, Masafumi Yamazaki, Akihiro Tabuchi, Takumi Honda, Tetsuya Izu, Noboru Kunihiro

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

Extended Attacks on ECDSA with Noisy Multiple Bit Nonce Leakages.

Shunsuke Osaki, Noboru Kunihiro

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

HS-Based Error Correction Algorithm for Noisy Binary GCD Side-Channel Sequences.

Kenta Tani, Noboru Kunihiro

Proceedings of the Applied Cryptography and Network Security, 2023

2022

Editor's Message to Special Issue of Computer Security Technologies for Quantum-Safe World.

Noboru Kunihiro

J. Inf. Process., 2022

Efficient Noise Generation Protocols for Differentially Private Multiparty Computation.

Reo Eriguchi, Atsunori Ichikawa, Noboru Kunihiro, Koji Nuida

IACR Cryptol. ePrint Arch., 2022

2021

Cryptanalysis of the RSA variant based on cubic Pell equation.

Mengce Zheng, Noboru Kunihiro, Yuanzhi Yao

Theor. Comput. Sci., 2021

Efficient Noise Generation to Achieve Differential Privacy with Applications to Secure Multiparty Computation.

Reo Eriguchi, Atsunori Ichikawa, Noboru Kunihiro, Koji Nuida

Proceedings of the Financial Cryptography and Data Security, 2021

2020

Generic hardness of inversion on ring and its relation to self-bilinear map.

Takashi Yamakawa, Shota Yamada, Goichiro Hanaoka, Noboru Kunihiro

Theor. Comput. Sci., 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

Strong security of linear ramp secret sharing schemes with general access structures.

Reo Eriguchi, Noboru Kunihiro

Inf. Process. Lett., 2020

Lattice-Based Cryptanalysis of RSA with Implicitly Related Keys.

Mengce Zheng, Noboru Kunihiro, Honggang Hu

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020

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

Noboru Kunihiro, Atsushi Takayasu

Discret. Appl. Math., 2020

A Linear Algebraic Approach to Strongly Secure Ramp Secret Sharing for General Access Structures.

Reo Eriguchi, Noboru Kunihiro, Koji Nuida

Proceedings of the International Symposium on Information Theory and Its Applications, 2020

d-Multiplicative Secret Sharing for Multipartite Adversary Structures.

Reo Eriguchi, Noboru Kunihiro

Proceedings of the 1st Conference on Information-Theoretic Cryptography, 2020

Practical Query-based Order Revealing Encryption from Symmetric Searchable Encryption.

Masayuki Yoshino, Ken Naganuma, Noboru Kunihiro, Hisayoshi Sato

Proceedings of the 15th Asia Joint Conference on Information Security, 2020

Post-Quantum zk-SNARK for Arithmetic Circuits using QAPs.

Ken Naganuma, Masayuki Yoshino, Atsuo Inoue, Yukinori Matsuoka, Mineaki Okazaki, Noboru Kunihiro

Proceedings of the 15th Asia Joint Conference on Information Security, 2020

New Secret Key Management Technology for Blockchains from Biometrics Fuzzy Signature.

Ken Naganuma, Takayuki Suzuki, Masayuki Yoshino, Kenta Takahashi, Yosuke Kaga, Noboru Kunihiro

Proceedings of the 15th Asia Joint Conference on Information Security, 2020

Recovering CRT-RSA Secret Keys from Noisy Square-and-Multiply Sequences in the Sliding Window Method.

Kento Oonishi, Noboru Kunihiro

Proceedings of the Information Security and Privacy - 25th Australasian Conference, 2020

2019

Partial key exposure attacks on RSA: Achieving the Boneh-Durfee bound.

Atsushi Takayasu, Noboru Kunihiro

Theor. Comput. Sci., 2019

Foreword.

Noboru Kunihiro, Yasutada Oohama

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

Strongly Secure Ramp Secret Sharing Schemes from Any Linear Secret Sharing Schemes.

Reo Eriguchi, Noboru Kunihiro

Proceedings of the 2019 IEEE Information Theory Workshop, 2019

Optimal Multiple Assignment Schemes Using Ideal Multipartite Secret Sharing Schemes.

Reo Eriguchi, Noboru Kunihiro, Mitsugu Iwamoto

Proceedings of the IEEE International Symposium on Information Theory, 2019

Improved CRT-RSA Secret Key Recovery Method from Sliding Window Leakage.

Kento Oonishi, Xiaoxuan Huang, Noboru Kunihiro

Proceedings of the Information Security and Cryptology - ICISC 2019, 2019

2018

Outsourced Private Function Evaluation with Privacy Policy Enforcement.

Noboru Kunihiro, Wenjie Lu, Takashi Nishide, Jun Sakuma

Proceedings of the 17th IEEE International Conference On Trust, 2018

Inference Attacks on Encrypted Databases Based on Order Preserving Assignment Problem.

Sota Onozawa, Noboru Kunihiro, Masayuki Yoshino, Ken Naganuma

Proceedings of the Advances in Information and Computer Security, 2018

Decentralized Netting Protocol over Consortium Blockchain.

Ken Naganuma, Masayuki Yoshino, Hisayoshi Sato, Nishio Yamada, Takayuki Suzuki, Noboru Kunihiro

Proceedings of the International Symposium on Information Theory and Its Applications, 2018

Multi-party Key Exchange Protocols from Supersingular Isogenies.

Satoshi Furukawa, Noboru Kunihiro, Katsuyuki Takashima

Proceedings of the International Symposium on Information Theory and Its Applications, 2018

Attacking Noisy Secret CRT-RSA Exponents in Binary Method.

Kento Oonishi, Noboru Kunihiro

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

Certifying Variant of RSA with Generalized Moduli.

Yao Lu, Noboru Kunihiro, Rui Zhang, Liqiang Peng, Hui Ma

Proceedings of the Information and Communications Security - 20th International Conference, 2018

Cryptanalysis of RSA Variants with Modified Euler Quotient.

Mengce Zheng, Noboru Kunihiro, Honggang Hu

Proceedings of the Progress in Cryptology - AFRICACRYPT 2018, 2018

A Deterministic Algorithm for Computing Divisors in an Interval.

Liqiang Peng, Yao Lu, Noboru Kunihiro, Rui Zhang, Lei Hu

Proceedings of the Information Security and Privacy - 23rd Australasian Conference, 2018

2017

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

Atsushi Takayasu, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017

Constructing Subspace Membership Encryption through Inner Product Encryption.

Shuichi Katsumata, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017

Self-Bilinear Map on Unknown Order Groups from Indistinguishability Obfuscation and Its Applications.

Takashi Yamakawa, Shota Yamada, Goichiro Hanaoka, Noboru Kunihiro

Algorithmica, 2017

Mis-operation Resistant Searchable Homomorphic Encryption.

Keita Emura, Takuya Hayashi, Noboru Kunihiro, Jun Sakuma

Proceedings of the 2017 ACM on Asia Conference on Computer and Communications Security, 2017

Bounds in Various Generalized Settings of the Discrete Logarithm Problem.

Jason H. M. Ying, Noboru Kunihiro

Proceedings of the Applied Cryptography and Network Security, 2017

Improved Factoring Attacks on Multi-prime RSA with Small Prime Difference.

Mengce Zheng, Noboru Kunihiro, Honggang Hu

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

Solving the DLP with Low Hamming Weight Product Exponents and Improved Attacks on the GPS Identification Scheme.

Jason H. M. Ying, Noboru Kunihiro

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

Mathematical Approach for Recovering Secret Key from Its Noisy Version.

Noboru Kunihiro

Proceedings of the Mathematical Modelling for Next-Generation Cryptography: CREST Crypto-Math Project, 2017

Recent Progress on Coppersmith's Lattice-Based Method: A Survey.

Yao Lu, Liqiang Peng, Noboru Kunihiro

Proceedings of the Mathematical Modelling for Next-Generation Cryptography: CREST Crypto-Math Project, 2017

2016

Searchable symmetric encryption capable of searching for an arbitrary string.

Yoshinao Uchide, Noboru Kunihiro

Secur. Commun. Networks, 2016

A limitation on security evaluation of cryptographic primitives with fixed keys.

Yutaka Kawai, Goichiro Hanaoka, Kazuo Ohta, Noboru Kunihiro

Secur. Commun. Networks, 2016

Adversary-dependent Lossy Trapdoor Function from Hardness of Factoring Semi-smooth RSA Subgroup Moduli.

Takashi Yamakawa, Shota Yamada, Goichiro Hanaoka, Noboru Kunihiro

IACR Cryptol. ePrint Arch., 2016

A Tool Kit for Partial Key Exposure Attacks on RSA.

Atsushi Takayasu, Noboru Kunihiro

IACR Cryptol. ePrint Arch., 2016

How to Generalize RSA Cryptanalyses.

Atsushi Takayasu, Noboru Kunihiro

IACR Cryptol. ePrint Arch., 2016

Improved Key Recovery Algorithms from Noisy RSA Secret Keys with Analog Noise.

Noboru Kunihiro, Yuki Takahashi

IACR Cryptol. ePrint Arch., 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

Decryption of Frequent Password Hashes in Rainbow Tables.

Hwei-Ming Ying, Noboru Kunihiro

Proceedings of the Fourth International Symposium on Computing and Networking, 2016

Cold Boot Attack Methods for the Discrete Logarithm Problem.

Hwei-Ming Ying, Noboru Kunihiro

Proceedings of the Fourth International Symposium on Computing and Networking, 2016

Improved Differential Fault Analysis on Camellia-128.

Toru Akishita, Noboru Kunihiro

Proceedings of the Constructive Side-Channel Analysis and Secure Design, 2016

Partial Server Side Parameter Selection in Private Information Retrieval.

Thomas Vannet, Noboru Kunihiro

Proceedings of the 11th Asia Joint Conference on Information Security, 2016

Generalized Hardness Assumption for Self-bilinear Map with Auxiliary Information.

Takashi Yamakawa, Goichiro Hanaoka, Noboru Kunihiro

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

Security Analysis on AUTH Protocol and Its Variant against the Man-in-the-Middle Attack.

Kosei Endo, Noboru Kunihiro

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

Private Information Retrieval with Preprocessing Based on the Approximate GCD Problem.

Thomas Vannet, Noboru Kunihiro

Proceedings of the Selected Areas in Cryptography - SAC 2015, 2015

An Improved Attack for Recovering Noisy RSA Secret Keys and Its Countermeasure.

Noboru Kunihiro

Proceedings of the Provable Security, 2015

Maximum Likelihood-Based Key Recovery Algorithm from Decayed Key Schedules.

Tomoyuki Tanigaki, Noboru Kunihiro

Proceedings of the Information Security and Cryptology - ICISC 2015, 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

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

Atsushi Takayasu, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014

A Unified Framework for Small Secret Exponent Attack on RSA.

Noboru Kunihiro, Naoyuki Shinohara, Tetsuya Izu

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014

Recovering RSA Secret Keys from Noisy Key Bits with Erasures and Errors.

Noboru Kunihiro, Naoyuki Shinohara, Tetsuya Izu

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014

A Framework and Compact Constructions for Non-monotonic Attribute-Based Encryption.

Shota Yamada, Nuttapong Attrapadung, Goichiro Hanaoka, Noboru Kunihiro

IACR Cryptol. ePrint Arch., 2014

RSA meets DPA: Recovering RSA Secret Keys from Noisy Analog Data.

Noboru Kunihiro, Junya Honda

IACR Cryptol. ePrint Arch., 2014

Chosen Ciphertext Security on Hard Membership Decision Groups: The Case of Semi-smooth Subgroups of Quadratic Residues.

Takashi Yamakawa, Shota Yamada, Koji Nuida, Goichiro Hanaoka, Noboru Kunihiro

Proceedings of the Security and Cryptography for Networks - 9th International Conference, 2014

On the Security Proof of an Authentication Protocol from Eurocrypt 2011.

Kosei Endo, Noboru Kunihiro

Proceedings of the Advances in Information and Computer Security, 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

Random Sampling Reduction with Precomputation.

Masayuki Yoshino, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013

Secret handshake scheme with request-based-revealing.

Yutaka Kawai, Noboru Kunihiro

Comput. Math. Appl., 2013

Reducing Public Key Sizes in Bounded CCA-Secure KEMs with Optimal Ciphertext Length.

Takashi Yamakawa, Shota Yamada, Takahiro Matsuda, Goichiro Hanaoka, Noboru Kunihiro

Proceedings of the Information Security, 16th International Conference, 2013

Efficient variants of the Naor-Yung and Dolev-Dwork-Naor transforms for CCA secure key encapsulation mechanism.

Takashi Yamakawa, Shota Yamada, Takahiro Matsuda, Goichiro Hanaoka, Noboru Kunihiro

Proceedings of the first ACM workshop on Asia public-key cryptography, 2013

2012

On the Hardness of Subset Sum Problem from Different Intervals.

Jun Kogure, Noboru Kunihiro, Hirosuke Yamamoto

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012

Symmetric Inner-Product Predicate Encryption Based on Three Groups.

Masayuki Yoshino, Noboru Kunihiro, Ken Naganuma, Hisayoshi Sato

Proceedings of the Provable Security - 6th International Conference, 2012

Space Efficient Signature Schemes from the RSA Assumption.

Shota Yamada, Goichiro Hanaoka, Noboru Kunihiro

Proceedings of the Public Key Cryptography - PKC 2012, 2012

Verifiable Predicate Encryption and Applications to CCA Security and Anonymous Predicate Authentication.

Shota Yamada, Nuttapong Attrapadung, Bagus Santoso, Jacob C. N. Schuldt, Goichiro Hanaoka, Noboru Kunihiro

Proceedings of the Public Key Cryptography - PKC 2012, 2012

On Optimal Bounds of Small Inverse Problems and Approximate GCD Problems with Higher Degree.

Noboru Kunihiro

Proceedings of the Information Security - 15th International Conference, 2012

Improving GGH cryptosystem for large error vector.

Masayuki Yoshino, Noboru Kunihiro

Proceedings of the International Symposium on Information Theory and its Applications, 2012

Multi-differential Cryptanalysis on Reduced DM-PRESENT-80: Collisions and Other Differential Properties.

Takuma Koyama, Yu Sasaki, Noboru Kunihiro

Proceedings of the Information Security and Cryptology - ICISC 2012, 2012

Two-Dimensional Representation of Cover Free Families and Its Applications: Short Signatures and More.

Shota Yamada, Goichiro Hanaoka, Noboru Kunihiro

Proceedings of the Topics in Cryptology - CT-RSA 2012 - The Cryptographers' Track at the RSA Conference 2012, San Francisco, CA, USA, February 27, 2012

Generic Construction of Chosen Ciphertext Secure Proxy Re-Encryption.

Goichiro Hanaoka, Yutaka Kawai, Noboru Kunihiro, Takahiro Matsuda, Jian Weng, Rui Zhang, Yunlei Zhao

Proceedings of the Topics in Cryptology - CT-RSA 2012 - The Cryptographers' Track at the RSA Conference 2012, San Francisco, CA, USA, February 27, 2012

Optimal Bounds for Multi-Prime Φ-Hiding Assumption.

Kaori Tosu, Noboru Kunihiro

Proceedings of the Information Security and Privacy - 17th Australasian Conference, 2012

Faster Algorithm for Solving Hard Knapsacks for Moderate Message Length.

Yuji Nagashima, Noboru Kunihiro

Proceedings of the Information Security and Privacy - 17th Australasian Conference, 2012

2011

On the (Im)possibility Results for Strong Attack Models for Public Key Cryptsystems.

Yutaka Kawai, Yusuke Sakai, Noboru Kunihiro

J. Internet Serv. Inf. Secur., 2011

Small Secret CRT-Exponent Attacks on Takagi's RSA.

Naoyuki Shinohara, Tetsuya Izu, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011

Solving Generalized Small Inverse Problems.

Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011

Generalized Security Analysis of the Random Key Bits Leakage Attack.

Jun Kogure, Noboru Kunihiro, Hirosuke Yamamoto

Proceedings of the Information Security Applications - 12th International Workshop, 2011

Generic Constructions for Chosen-Ciphertext Secure Attribute Based Encryption.

Shota Yamada, Nuttapong Attrapadung, Goichiro Hanaoka, Noboru Kunihiro

Proceedings of the Public Key Cryptography - PKC 2011, 2011

Yet Another Sanitizable and Deletable Signatures.

Tetsuya Izu, Masami Izumi, Noboru Kunihiro, Kazuo Ohta

Proceedings of the 25th IEEE International Conference on Advanced Information Networking and Applications Workshops, 2011

2010

Quantum addition circuits and unbounded fan-out.

Yasuhiro Takahashi, Seiichiro Tani, Noboru Kunihiro

Quantum Inf. Comput., 2010

Public Key Encryption Schemes from the (B)CDH Assumption with Better Efficiency.

Shota Yamada, Yutaka Kawai, Goichiro Hanaoka, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

Cryptanalysis of Two MD5-Based Authentication Protocols: APOP and NMAC.

Lei Wang, Kazuo Ohta, Yu Sasaki, Kazuo Sakiyama, Noboru Kunihiro

IEICE Trans. Inf. Syst., 2010

Practical Password Recovery Attacks on MD4 Based Prefix and Hybrid Authentication Protocols.

Yu Sasaki, Lei Wang, Kazuo Ohta, Kazumaro Aoki, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

New Conditions for Secure Knapsack Schemes against Lattice Attack.

Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

Extension of Secret Handshake Protocols with Multiple Groups in Monotone Condition.

Yutaka Kawai, Shotaro Tanno, Takahiro Kondo, Kazuki Yoneyama, Kazuo Ohta, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

Toward an Easy-to-Understand Structure for Achieving Chosen Ciphertext Security from the Decisional Diffie-Hellman Assumption.

Shota Yamada, Goichiro Hanaoka, Noboru Kunihiro

Proceedings of the Provable Security - 4th International Conference, 2010

An Evaluation of the Sieving Device YASD for 1024-Bit Integers.

Naoyuki Hirota, Tetsuya Izu, Noboru Kunihiro, Kazuo Ohta

Proceedings of the 13th International Conference on Network-Based Information Systems, 2010

2009

A Strict Evaluation on the Number of Conditions for SHA-1 Collision Search.

Jun Yajima, Terutoshi Iwasaki, Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Thomas Peyrin, Noboru Kunihiro, Kazuo Ohta

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

Near-Collision Attacks on MD4: Applied to MD4-Based Protocols.

Lei Wang, Kazuo Ohta, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

Extended Password Recovery Attacks against APOP, SIP, and Digest Authentication.

Yu Sasaki, Lei Wang, Kazuo Ohta, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

Small Secret Key Attack on a Takagi's Variant of RSA.

Kouichi Itoh, Noboru Kunihiro, Kaoru Kurosawa

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

Yet Another Sanitizable Signature from Bilinear Maps.

Tetsuya Izu, Noboru Kunihiro, Kazuo Ohta, Makoto Sano, Masahiko Takenaka

Proceedings of the The Forth International Conference on Availability, 2009

2008

A fast quantum circuit for addition with few qubits.

Yasuhiro Takahashi, Noboru Kunihiro

Quantum Inf. Comput., 2008

New Message Differences for Collision Attacks on MD4 and MD5.

Yu Sasaki, Lei Wang, Noboru Kunihiro, Kazuo Ohta

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Factorization of Square-Free Integers with High Bits Known.

Bagus Santoso, Noboru Kunihiro, Naoki Kanayama, Kazuo Ohta

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Improved Collision Search for Hash Functions: New Advanced Message Modification.

Yusuke Naito, Kazuo Ohta, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Deterministic Polynomial Time Equivalence between Factoring and Key-Recovery Attack on Takagi's RSA.

Noboru Kunihiro, Kaoru Kurosawa

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Sanitizable and Deletable Signature.

Tetsuya Izu, Noboru Kunihiro, Kazuo Ohta, Makoto Sano, Masahiko Takenaka

Proceedings of the Information Security Applications, 9th International Workshop, 2008

New Key-Recovery Attacks on HMAC/NMAC-MD4 and NMAC-MD5.

Lei Wang, Kazuo Ohta, Noboru Kunihiro

Proceedings of the Advances in Cryptology, 2008

Security of MD5 Challenge and Response: Extension of APOP Password Recovery Attack.

Yu Sasaki, Lei Wang, Kazuo Ohta, Noboru Kunihiro

Proceedings of the Topics in Cryptology, 2008

Small Secret Key Attack on a Variant of RSA (Due to Takagi).

Kouichi Itoh, Noboru Kunihiro, Kaoru Kurosawa

Proceedings of the Topics in Cryptology, 2008

A strict evaluation method on the number of conditions for the SHA-1 collision search.

Jun Yajima, Terutoshi Iwasaki, Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta

Proceedings of the 2008 ACM Symposium on Information, Computer and Communications Security, 2008

Password Recovery on Challenge and Response: Impossible Differential Attack on Hash Function.

Yu Sasaki, Lei Wang, Kazuo Ohta, Noboru Kunihiro

Proceedings of the Progress in Cryptology, 2008

New Definition of Density on Knapsack Cryptosystems.

Noboru Kunihiro

Proceedings of the Progress in Cryptology, 2008

2007

The quantum fourier transform on a linear nearest neighbor architecture.

Yasuhiro Takahashi, Noboru Kunihiro, Kazuo Ohta

Quantum Inf. Comput., 2007

Improved Collision Attacks on MD4 and MD5.

Yu Sasaki, Yusuke Naito, Noboru Kunihiro, Kazuo Ohta

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007

Provably Secure Untraceable Electronic Cash against Insider Attacks.

Yoshikazu Hanatani, Yuichi Komano, Kazuo Ohta, Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007

A Sanitizable Signature Scheme with Aggregation.

Tetsuya Izu, Noboru Kunihiro, Kazuo Ohta, Masahiko Takenaka, Takashi Yoshioka

Proceedings of the Information Security Practice and Experience, 2007

New Message Difference for MD4.

Yu Sasaki, Lei Wang, Kazuo Ohta, Noboru Kunihiro

Proceedings of the Fast Software Encryption, 14th International Workshop, 2007

A New Strategy for Finding a Differential Path of SHA-1.

Jun Yajima, Yu Sasaki, Yusuke Naito, Terutoshi Iwasaki, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta

Proceedings of the Information Security and Privacy, 12th Australasian Conference, 2007

2006

A quantum circuit for shor's factoring algorithm using 2n + 2 qubits.

Yasuhiro Takahashi, Noboru Kunihiro

Quantum Inf. Comput., 2006

Maurer-Yacobi ID-Based Key Distribution Revisited.

Noboru Kunihiro, Wataru Abe, Kazuo Ohta

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006

Visual Secret Sharing Schemes for Multiple Secret Images Allowing the Rotation of Shares.

Mitsugu Iwamoto, Lei Wang, Kazuki Yoneyama, Noboru Kunihiro, Kazuo Ohta

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006

How to Construct Sufficient Condition in Searching Collisions of MD5.

Yu Sasaki, Yusuke Naito, Jun Yajima, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta

IACR Cryptol. ePrint Arch., 2006

Message Modification for Step 21-23 on SHA-0.

Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Jun Yajima, Noboru Kunihiro, Kazuo Ohta

IACR Cryptol. ePrint Arch., 2006

How to Construct Sufficient Conditions for Hash Functions.

Yu Sasaki, Yusuke Naito, Jun Yajima, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta

Proceedings of the Progressin Cryptology, 2006

Provably Secure Electronic Cash Based on Blind Multisignature Schemes.

Yoshikazu Hanatani, Yuichi Komano, Kazuo Ohta, Noboru Kunihiro

Proceedings of the Financial Cryptography and Data Security, 2006

Problems on the MR micropayment schemes.

Masahiro Mambo, Moisés Salinas-Rosales, Kazuo Ohta, Noboru Kunihiro

Proceedings of the 2006 ACM Symposium on Information, Computer and Communications Security, 2006

Improved Collision Search for SHA-0.

Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Jun Yajima, Noboru Kunihiro, Kazuo Ohta

Proceedings of the Advances in Cryptology, 2006

2005

A linear-size quantum circuit for addition with no ancillary qubits.

Yasuhiro Takahashi, Noboru Kunihiro

Quantum Inf. Comput., 2005

Exact Analyses of Computational Time for Factoring in Quantum Computers.

Noboru Kunihiro

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005

Improved Collision Attack on MD5.

Yu Sasaki, Yusuke Naito, Noboru Kunihiro, Kazuo Ohta

IACR Cryptol. ePrint Arch., 2005

Improved Collision Attack on MD4.

Yusuke Naito, Yu Sasaki, Noboru Kunihiro, Kazuo Ohta

IACR Cryptol. ePrint Arch., 2005

Analysis on the Clockwise Transposition Routing for Dedicated Factoring Devices.

Tetsuya Izu, Noboru Kunihiro, Kazuo Ohta, Takeshi Shimoyama

Proceedings of the Information Security Applications, 6th International Workshop, 2005

Improved Collision Attack on MD4 with Probability Almost 1.

Yusuke Naito, Yu Sasaki, Noboru Kunihiro, Kazuo Ohta

Proceedings of the Information Security and Cryptology, 2005

2003

A Quantum Algorithm Using NMR Computers to Break Secret-Key Cryptosystems.

Kazuo Ohta, Tetsuo Nishino, Seiya Okubo, Noboru Kunihiro

New Gener. Comput., 2003

Efficient Algorithms for NMR Quantum Computers with Small Qubits.

Noboru Kunihiro, Shigeru Yamashita

New Gener. Comput., 2003

1999

Modulus Search for Elliptic Curve Cryptosystems.

Kenji Koyama, Yukio Tsuruoka, Noboru Kunihiro

Proceedings of the Advances in Cryptology, 1999

1998

Equivalence of Counting the Number of Points on Elliptic Curve over the Ring Z_n and Factoring n.

Noboru Kunihiro, Kenji Koyama

Proceedings of the Advances in Cryptology - EUROCRYPT '98, International Conference on the Theory and Application of Cryptographic Techniques, Espoo, Finland, May 31, 1998