Multi-user Dynamic Searchable Encryption for Prefix-Fixing Predicates from Symmetric-Key Primitives - Takato Hirano; Yutaka Kawai; Yoshihiro Koseki; Satoshi Yasuda; Yohei Watanabe; Takumi Amada; Mitsugu Iwamoto; Kazuo Ohta (Selected Areas in Cryptography - SAC 2024 - 31st International Conference, Montreal, QC, Canada, August 28-30, 2024, Revised Selected Papers, Part I, 2024)

DBMS-Friendly Searchable Symmetric Encryption: Constructing Index Generation Suitable for Database Management Systems - Takato Hirano; Yutaka Kawai; Yoshihiro Koseki (IEEE Conference on Dependable and Secure Computing, DSC 2021, Aizuwakamatsu, Japan, January 30 - February 2, 2021, 2021)

Determination of Parameters Balancing between Security and Search Performance on Searchable Encryption - Ikumi Mori; Takato Hirano; Yoshitaka Nakamura; Hiroshi Inamura (Thirteenth International Conference on Mobile Computing and Ubiquitous Network, ICMU 2021, Tokyo, Japan, November 17-19, 2021, 2021)

Public-key Searchable Encryption with Index Generation for Shared Database - Nori Matsuda; Takato Hirano; Yutaka Kawai; Takashi Ito; Mitsuhiro Hattori; Tadakazu Yamanaka; Masakatsu Nishigaki (J. Inf. Process., 2020)

Proxy Re-Encryption That Supports Homomorphic Operations for Re-Encrypted Ciphertexts - Yutaka Kawai; Takahiro Matsuda; Takato Hirano; Yoshihiro Koseki; Goichiro Hanaoka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019)

Privacy-Utility Tradeoff for Applications Using Energy Disaggregation of Smart-Meter Data - Mitsuhiro Hattori; Takato Hirano; Nori Matsuda; Fumio Omatsu; Rina Shimizu; Ye Wang (J. Inf. Process., 2018)

Efficient Trapdoor Generation from Multiple Hashing in Searchable Symmetric Encryption - Takato Hirano; Yutaka Kawai; Yoshihiro Koseki (Information Security Practice and Experience - 14th International Conference, ISPEC 2018, Tokyo, Japan, September 25-27, 2018, Proceedings, 2018)

Token-Based Multi-input Functional Encryption - Nuttapong Attrapadung; Goichiro Hanaoka; Takato Hirano; Yutaka Kawai; Yoshihiro Koseki; Jacob C. N. Schuldt (Provable Security - 12th International Conference, ProvSec 2018, Jeju, South Korea, October 25-28, 2018, Proceedings, 2018)

Privacy-Utility Tradeoff for Applications Using Energy Disaggregation of Smart-Meter Data - Mitsuhiro Hattori; Takato Hirano; Nori Matsuda; Rina Shimizu; Ye Wang (Information Security and Privacy - 22nd Australasian Conference, ACISP 2017, Auckland, New Zealand, July 3-5, 2017, Proceedings, Part II, 2017)

On methods for privacy-preserving energy disaggregation - Ye Wang; Nisarg Raval; Prakash Ishwar; Mitsuhiro Hattori; Takato Hirano; Nori Matsuda; Rina Shimizu (2017 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2017, New Orleans, LA, USA, March 5-9, 2017, 2017)

Probabilistic Generation of Trapdoors: Reducing Information Leakage of Searchable Symmetric Encryption - Kenichiro Hayasaka; Yutaka Kawai; Yoshihiro Koseki; Takato Hirano; Kazuo Ohta; Mitsugu Iwamoto (Cryptology and Network Security - 15th International Conference, CANS 2016, Milan, Italy, November 14-16, 2016, Proceedings, 2016)

A practical attack to AINA2014's countermeasure for cancelable biometric authentication protocols - Takato Hirano; Takashi Ito; Yutaka Kawai; Nori Matsuda; Takumi Yamamoto; Tatsuji Munaka (2016 International Symposium on Information Theory and Its Applications, ISITA 2016, Monterey, CA, USA, October 30 - November 2, 2016, 2016)

Simple, Secure, and Efficient Searchable Symmetric Encryption with Multiple Encrypted Indexes - Takato Hirano; Mitsuhiro Hattori; Yutaka Kawai; Nori Matsuda; Mitsugu Iwamoto; Kazuo Ohta; Yusuke Sakai; Tatsuji Munaka (Advances in Information and Computer Security - 11th International Workshop on Security, IWSEC 2016, Tokyo, Japan, September 12-14, 2016, Proceedings, 2016)

SEPM: Efficient Partial Keyword Search on Encrypted Data - Yutaka Kawai; Takato Hirano; Yoshihiro Koseki; Tatsuji Munaka (Cryptology and Network Security - 14th International Conference, CANS 2015, Marrakesh, Morocco, December 10-12, 2015, Proceedings, 2015)

Ciphertext-Policy Delegatable Hidden Vector Encryption and Its Application - Mitsuhiro Hattori; Takato Hirano; Takashi Ito; Nori Matsuda; Takumi Mori; Yusuke Sakai; Kazuo Ohta (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Cryptographically-Secure and Efficient Remote Cancelable Biometrics Based on Public-Key Homomorphic Encryption - Takato Hirano; Mitsuhiro Hattori; Takashi Ito; Nori Matsuda (Advances in Information and Computer Security - 8th International Workshop on Security, IWSEC 2013, Okinawa, Japan, November 18-20, 2013, Proceedings, 2013)

Homomorphic encryption based cancelable biometrics secure against replay and its related attack - Takato Hirano; Mitsuhiro Hattori; Takashi Ito; Nori Matsuda; Takumi Mori (Proceedings of the International Symposium on Information Theory and its Applications, ISITA 2012, Honolulu, HI, USA, October 28-31, 2012, 2012)

Ciphertext-Policy Delegatable Hidden Vector Encryption and Its Application to Searchable Encryption in Multi-user Setting - Mitsuhiro Hattori; Takato Hirano; Takashi Ito; Nori Matsuda; Takumi Mori; Yusuke Sakai; Kazuo Ohta (Cryptography and Coding - 13th IMA International Conference, IMACC 2011, Oxford, UK, December 12-15, 2011. Proceedings, 2011)

Key Generation for Fast Inversion of the Paillier Encryption Function - Takato Hirano; Keisuke Tanaka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010)

Primitive Power Roots of Unity and Its Application to Encryption - Takato Hirano; Koichiro Wada; Keisuke Tanaka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Public-Key Cryptosystems with Primitive Power Roots of Unity - Takato Hirano; Koichiro Wada; Keisuke Tanaka (Information Security and Privacy, 13th Australasian Conference, ACISP 2008, Wollongong, Australia, July 7-9, 2008, Proceedings, 2008)