Takao Murakami

According to our database, Takao Murakami authored at least 60 papers between 2005 and 2024.

Collaborative distances:

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

2024

Degree-Preserving Randomized Response for Graph Neural Networks under Local Differential Privacy.

Seira Hidano, Takao Murakami

Trans. Data Priv., May, 2024

Synthesizing differentially private location traces including co-locations.

Jun Narita, Takao Murakami, Hideitsu Hino, Masakatsu Nishigaki, Tetsushi Ohki

Int. J. Inf. Sec., February, 2024

Federated Graph Analytics with Differential Privacy.

Shang Liu, Yang Cao, Takao Murakami, Weiran Liu, Seng Pei Liew, Tsubasa Takahashi, Jinfei Liu, Masatoshi Yoshikawa

CoRR, 2024

CARGO: Crypto-Assisted Differentially Private Triangle Counting Without Trusted Servers.

Shang Liu, Yang Cao, Takao Murakami, Jinfei Liu, Masatoshi Yoshikawa

Proceedings of the 40th IEEE International Conference on Data Engineering, 2024

Card-Based Cryptography Meets Differential Privacy.

Reo Eriguchi, Kazumasa Shinagawa, Takao Murakami

Proceedings of the 12th International Conference on Fun with Algorithms, 2024

2023

Automatic Tuning of Privacy Budgets in Input-Discriminative Local Differential Privacy.

Takao Murakami, Yuichi Sei

IEEE Internet Things J., September, 2023

Designing a Location Trace Anonymization Contest.

Takao Murakami, Hiromi Arai, Koki Hamada, Takuma Hatano, Makoto Iguchi, Hiroaki Kikuchi, Atsushi Kuromasa, Hiroshi Nakagawa, Yuichi Nakamura, Kenshiro Nishiyama, Ryo Nojima, Hidenobu Oguri, Chiemi Watanabe, Akira Yamada, Takayasu Yamaguchi, Yuji Yamaoka

Proc. Priv. Enhancing Technol., January, 2023

Two-Dimensional Dynamic Fusion for Continuous Authentication.

Nuttapong Attrapadung, Goichiro Hanaoka, Haochen M. Kotoi-Xie, Takahiro Matsuda, Takumi Moriyama, Takao Murakami, Hidenori Nakamura, Jacob C. N. Schuldt, Masaaki Tokuyama, Jing Zhang

Proceedings of the IEEE International Joint Conference on Biometrics, 2023

2022

Differentially Private Subgraph Counting in the Shuffle Model.

Jacob Imola, Takao Murakami, Kamalika Chaudhuri

CoRR, 2022

Communication-Efficient Triangle Counting under Local Differential Privacy.

Jacob Imola, Takao Murakami, Kamalika Chaudhuri

Proceedings of the 31st USENIX Security Symposium, 2022

Differentially Private Triangle and 4-Cycle Counting in the Shuffle Model.

Jacob Imola, Takao Murakami, Kamalika Chaudhuri

Proceedings of the 2022 ACM SIGSAC Conference on Computer and Communications Security, 2022

A Crypto-Assisted Approach for Publishing Graph Statistics with Node Local Differential Privacy.

Shang Liu, Yang Cao, Takao Murakami, Masatoshi Yoshikawa

Proceedings of the IEEE International Conference on Big Data, 2022

2021

Toward Evaluating Re-identification Risks in the Local Privacy Model.

Takao Murakami, Kenta Takahashi

Trans. Data Priv., 2021

Privacy-Preserving Multiple Tensor Factorization for Synthesizing Large-Scale Location Traces with Cluster-Specific Features.

Takao Murakami, Koki Hamada, Yusuke Kawamoto, Takuma Hatano

Proc. Priv. Enhancing Technol., 2021

Locally Differentially Private Analysis of Graph Statistics.

Jacob Imola, Takao Murakami, Kamalika Chaudhuri

Proceedings of the 30th USENIX Security Symposium, 2021

TransMIA: Membership Inference Attacks Using Transfer Shadow Training.

Seira Hidano, Takao Murakami, Yusuke Kawamoto

Proceedings of the International Joint Conference on Neural Networks, 2021

Synthesizing Privacy-Preserving Location Traces Including Co-locations.

Jun Narita, Yayoi Suganuma, Masakatsu Nishigaki, Takao Murakami, Tetsushi Ohki

Proceedings of the Data Privacy Management, Cryptocurrencies and Blockchain Technology, 2021

Locality Sensitive Hashing with Extended Differential Privacy.

Natasha Fernandes, Yusuke Kawamoto, Takao Murakami

Proceedings of the Computer Security - ESORICS 2021, 2021

2020

Exposing Private User Behaviors of Collaborative Filtering via Model Inversion Techniques.

Seira Hidano, Takao Murakami, Shuichi Katsumata, Shinsaku Kiyomoto, Goichiro Hanaoka

Proc. Priv. Enhancing Technol., 2020

2019

Cancelable indexing based on low-rank approximation of correlation-invariant random filtering for fast and secure biometric identification.

Takao Murakami, Tetsushi Ohki, Yosuke Kaga, Masakazu Fujio, Kenta Takahashi

Pattern Recognit. Lett., 2019

Improved Security Evaluation Techniques for Imperfect Randomness from Arbitrary Distributions.

Takahiro Matsuda, Kenta Takahashi, Takao Murakami, Goichiro Hanaoka

IACR Cryptol. ePrint Arch., 2019

Privacy-Preserving Multiple Tensor Factorization for Synthesizing Large-Scale Location Traces.

Takao Murakami, Koki Hamada, Yusuke Kawamoto, Takuma Hatano

CoRR, 2019

Local Distribution Obfuscation via Probability Coupling.

Yusuke Kawamoto, Takao Murakami

CoRR, 2019

Cancelable Permutation-Based Indexing for Secure and Efficient Biometric Identification.

Takao Murakami, Ryo Fujita, Tetsushi Ohki, Yosuke Kaga, Masakazu Fujio, Kenta Takahashi

IEEE Access, 2019

Utility-Optimized Local Differential Privacy Mechanisms for Distribution Estimation.

Takao Murakami, Yusuke Kawamoto

Proceedings of the 28th USENIX Security Symposium, 2019

Local Obfuscation Mechanisms for Hiding Probability Distributions.

Yusuke Kawamoto, Takao Murakami

Proceedings of the Computer Security - ESORICS 2019, 2019

Local Distribution Obfuscation via Probability Coupling^*.

Yusuke Kawamoto, Takao Murakami

Proceedings of the 57th Annual Allerton Conference on Communication, 2019

2018

Toward Distribution Estimation under Local Differential Privacy with Small Samples.

Takao Murakami, Hideitsu Hino, Jun Sakuma

Proc. Priv. Enhancing Technol., 2018

How to Handle Excessively Anonymized Datasets.

Ryo Nojima, Hidenobu Oguri, Hiroaki Kikuchi, Hiroshi Nakagawa, Koki Hamada, Takao Murakami, Yuji Yamaoka, Chiemi Watanabe

J. Inf. Process., 2018

Model Inversion Attacks for Online Prediction Systems: Without Knowledge of Non-Sensitive Attributes.

Seira Hidano, Takao Murakami, Shuichi Katsumata, Shinsaku Kiyomoto, Goichiro Hanaoka

IEICE Trans. Inf. Syst., 2018

Differentially Private Obfuscation Mechanisms for Hiding Probability Distributions.

Yusuke Kawamoto, Takao Murakami

CoRR, 2018

Restricted Local Differential Privacy for Distribution Estimation with High Data Utility.

Takao Murakami, Yusuke Kawamoto

CoRR, 2018

A Succinct Model for Re-identification of Mobility Traces Based on Small Training Data.

Takao Murakami

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

On the Anonymization of Differentially Private Location Obfuscation.

Yusuke Kawamoto, Takao Murakami

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

Face/Fingerphoto Spoof Detection under Noisy Conditions by using Deep Convolutional Neural Network.

Masakazu Fujio, Yosuke Kaga, Takao Murakami, Tetsushi Ohki, Kenta Takahashi

Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2018), 2018

A Generalization of the Theory of Biometric System Entropy.

Kenta Takahashi, Takao Murakami

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

2017

Group Sparsity Tensor Factorization for Re-Identification of Open Mobility Traces.

Takao Murakami, Atsunori Kanemura, Hideitsu Hino

IEEE Trans. Inf. Forensics Secur., 2017

Expectation-Maximization Tensor Factorization for Practical Location Privacy Attacks.

Takao Murakami

Proc. Priv. Enhancing Technol., 2017

Modality Selection Attacks and Modality Restriction in Likelihood-Ratio Based Biometric Score Fusion.

Takao Murakami, Yosuke Kaga, Kenta Takahashi

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

Signature Schemes with a Fuzzy Private Key.

Kenta Takahashi, Takahiro Matsuda, Takao Murakami, Goichiro Hanaoka, Masakatsu Nishigaki

IACR Cryptol. ePrint Arch., 2017

Model Inversion Attacks for Prediction Systems: Without Knowledge of Non-Sensitive Attributes.

Seira Hidano, Takao Murakami, Shuichi Katsumata, Shinsaku Kiyomoto, Goichiro Hanaoka

Proceedings of the 15th Annual Conference on Privacy, Security and Trust, 2017

A Secure and Practical Signature Scheme for Blockchain Based on Biometrics.

Yosuke Kaga, Masakazu Fujio, Ken Naganuma, Kenta Takahashi, Takao Murakami, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Information Security Practice and Experience, 2017

2016

Localization Attacks Using Matrix and Tensor Factorization.

Takao Murakami, Hajime Watanabe

IEEE Trans. Inf. Forensics Secur., 2016

Optimal sequential fusion for multibiometric cryptosystems.

Takao Murakami, Tetsushi Ohki, Kenta Takahashi

Inf. Fusion, 2016

Information-Theoretic Performance Evaluation of Multibiometric Fusion under Modality Selection Attacks.

Takao Murakami, Yosuke Kaga, Kenta Takahashi

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016

On restricting modalities in likelihood-ratio based biometric score fusion.

Takao Murakami, Yosuke Kaga, Kenta Takahashi

Proceedings of the 23rd International Conference on Pattern Recognition, 2016

Fuzzy Signatures: Relaxing Requirements and a New Construction.

Takahiro Matsuda, Kenta Takahashi, Takao Murakami, Goichiro Hanaoka

Proceedings of the Applied Cryptography and Network Security, 2016

2015

Group Sparsity Tensor Factorization for De-anonymization of Mobility Traces.

Takao Murakami, Atsunori Kanemura, Hideitsu Hino

Proceedings of the 2015 IEEE TrustCom/BigDataSE/ISPA, 2015

Information-theoretic performance evaluation of likelihood-ratio based biometric score fusion under modality selection attacks.

Takao Murakami, Kenta Takahashi

Proceedings of the IEEE 7th International Conference on Biometrics Theory, 2015

A Signature Scheme with a Fuzzy Private Key.

Kenta Takahashi, Takahiro Matsuda, Takao Murakami, Goichiro Hanaoka, Masakatsu Nishigaki

Proceedings of the Applied Cryptography and Network Security, 2015

2014

Toward Optimal Fusion Algorithms With Security Against Wolves and Lambs in Biometrics.

Takao Murakami, Kenta Takahashi, Kanta Matsuura

IEEE Trans. Inf. Forensics Secur., 2014

A measure of information gained through biometric systems.

Kenta Takahashi, Takao Murakami

Image Vis. Comput., 2014

A General Framework and Algorithms for Score Level Indexing and Fusion in Biometric Identification.

Takao Murakami, Kenta Takahashi, Kanta Matsuura

IEICE Trans. Inf. Syst., 2014

Location prediction attacks using tensor factorization and optimal defenses.

Takao Murakami, Hajime Watanabe

Proceedings of the 2014 IEEE International Conference on Big Data (IEEE BigData 2014), 2014

2013

Probabilistic enhancement of approximate indexing in metric spaces.

Takao Murakami, Kenta Takahashi, Susumu Serita, Yasuhiro Fujii

Inf. Syst., 2013

2012

Towards optimal countermeasures against wolves and lambs in biometrics.

Takao Murakami, Kenta Takahashi, Kanta Matsuura

Proceedings of the IEEE Fifth International Conference on Biometrics: Theory, 2012

2011

Versatile probability-based indexing for approximate similarity search.

Takao Murakami, Kenta Takahashi, Susumu Serita, Yasuhiro Fujii

Proceedings of the Fourth International Conference on Similarity Search and Applications, 2011

Fast and accurate biometric identification using score level indexing and fusion.

Takao Murakami, Kenta Takahashi

Proceedings of the 2011 IEEE International Joint Conference on Biometrics, 2011

2009

Accuracy improvement with high convenience in biometric identification using multihypothesis sequential probability ratio test.

Takao Murakami, Kenta Takahashi

Proceedings of the First IEEE International Workshop on Information Forensics and Security, 2009

2005

Japanese vowel recognition based on structural representation of speech.

Takao Murakami, Kazutaka Maruyama, Nobuaki Minematsu, Keikichi Hirose

Proceedings of the 9th European Conference on Speech Communication and Technology, 2005