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Our Researchers

April 19, 2023

Hikaru Tsuchida

Special Researcher
Ph.D. in Engineering

Research Area

  • Cryptography and Information Security

Papers

  • Tsuchida, H., Nishide, T., Okamoto, E., & Kim, K. (2016). Revocable decentralized multi-authority functional encryption. In Progress in Cryptology–INDOCRYPT 2016: 17th International Conference on Cryptology in India, Kolkata, India, December 11-14, 2016, Proceedings 17 (pp. 248-265). Springer International Publishing.
  • Araki, T., Barak, A., Furukawa, J., Keller, M., Lindell, Y., Ohara, K., & Tsuchida, H. (2018, October). Generalizing the SPDZ compiler for other protocols. In Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security (pp. 880-895).
  • Araki, T., Barak, A., Furukawa, J., Keller, M., Ohara, K., & Tsuchida, H. (2018, October). How to choose suitable secure multiparty computation using generalized SPDZ. In Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security (pp. 2198-2200).
  • Tsuchida, H., Nishide, T., & Okamoto, E. (2018). Expressive ciphertext-policy attribute-based encryption with fast decryption. J. Internet Serv. Inf. Secur., 8(4), 37-56.
  • Tsuchida, H., Nishide, T., & Maeda, Y. (2020). Private decision tree evaluation with constant rounds via (only) SS-3PC over ring. In Provable and Practical Security: 14th International Conference, ProvSec 2020, Singapore, November 29–December 1, 2020, Proceedings 14 (pp. 298-317). Springer International Publishing.
  • Tsuchida, H., & Nishide, T. (2020, October). Client-Aided Bit-Composition Protocol with Guaranteed Output Delivery. In 2020 International Symposium on Information Theory and Its Applications (ISITA) (pp. 387-391). IEEE.
  • Araki, T., Furukawa, J., Ohara, K., Pinkas, B., Rosemarin, H., & Tsuchida, H. (2021, November). Secure graph analysis at scale. In Proceedings of the 2021 ACM SIGSAC Conference on Computer and Communications Security (pp. 610-629).
  • Tsuchida, H., & Nishide, T. (2021). Client-aided Robust Bit-composition Protocol with Deterministic Cheater Identification in Standard Model. Journal of Information Processing, 29, 515-524.
  • Tsuchida, H., & Nishide, T. (2021). Private decision tree evaluation with constant rounds via (only) fair SS-4PC. In Information Security and Privacy: 26th Australasian Conference, ACISP 2021, Virtual Event, December 1–3, 2021, Proceedings 26 (pp. 309-329). Springer International Publishing.
  • Chourasia, R., Enkhtaivan, B., Ito, K., Mori, J., Teranishi, I., & Tsuchida, H. (2022). Knowledge Cross-Distillation for Membership Privacy. Proceedings on Privacy Enhancing Technologies, 2, 362-377.
  • Tsuchida, H., Nishide, T., & Maeda, Y. (2022). Private Decision Tree Evaluation with Constant Rounds via (Only) SS-3PC over Ring and Field. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 105(3), 214-230.
  • Tsuchida, H., & Nishide, T. (2022). Constant-Round Fair SS-4PC for Private Decision Tree Evaluation. IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences, 105(9), 1270-1288.
  • Tsuchida, H., Higo, H., Isshiki, T., & Mori, K. (2022, October). Hash-Chain-Based Sanitizable Signatures for Deletion and Generalization Processes. In ISITA 2022.
  • Ishibashi, T., Ohigashi, T., & Tsuchida, T. (2022, December). Unbounded Revocable Decentralized Multi-Authority Attribute-Based Encryption Supporting Non-Monotone Access Structures. In SECITC 2022.

Awards/Prizes

  • A3 Foresight Program Annual Workshop 2015 Best Presentation Award
  • Information Security Research Encouragement Award (2016)
  • ISITA 2020 Best Student Paper Award
  • IEEE IT Society Japan Chapter Young Researcher Best Paper Award for ISITA 2020
  • 2022 Programme Leader Award in Risk and Resilience Engineering (Research Category)

Academic society, communicty, etc.

  • Information Technology Standards Commission of Japan ISO/IEC JTC1/SC27/WG2 Committee Member (2020-present)

Patents (Issued ones only)

  • NEC Corporation. Hikaru TSUCHIDA, Kengo MORI, Toshiyuki ISSHIKI: Information processing device, verification device, and information processing system. 20200145212.
  • NEC Corporation. Hikaru TSUCHIDA, Kengo MORI, Toshiyuki ISSHIKI: ACCESS TOKEN SYSTEM, INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND INFORMATION PROCESSING PROGRAM. 20200177389.
  • NEC Corporation Of America, Bar-Ilan University, NEC Corporation. Jun Furukawa, Joseph Keshet, Kazuma Ohara, Toshinori Araki, Hikaru Tsuchida, Takuma Amada, Kazuya Kakizaki, Shir Aviv-Reuven: Systems and methods for generating and applying a secure statistical classifier. 20200293944.
  • NEC Corporation. Hikaru TSUCHIDA, Toshinori Araki, Kazuma Ohara: Server device, secret equality determination system, secret equality determination method and secret equality determination program recording medium. 20200374107.
  • NEC Corporation. Hikaru TSUCHIDA, Toshinori Araki, Kazuma Ohara: Secret equality determination system, secret equality determination method and secret equality determination program recording medium. 20210176252.
  • NEC Corporation. Araki Toshinori, Tsuchida Hikaru, Ohara Kazuma: UMWANDLUNGSVORRICHTUNG, UMWANDLUNGSVERFAHREN UND PROGRAMM. 112018008000.
  • NEC Corporation. Hikaru TSUCHIDA, Toshinori ARAKI, Kazuma OHARA: INFORMATION PROCESSING APPARATUS, SECRET CALCULATION METHOD, AND PROGRAM. 20210351916.
  • NEC CORPORATION. TSUCHIDA Hikaru, TERANISHI Isamu: INFERENCE APPARATUS, INFERENCE METHOD AND COMPUTER-READABLE STORAGE MEDIUM. WO/2022/018867.
  • NEC Corporation. Toshinori Araki, Hikaru Tsuhida, Kazuma Ohara: Conversion apparatus, conversion method and program. 20220035608.
  • NEC Corporation. Hikaru TSUCHIDA, Takao TAKENOUCHI, Toshinori ARAKI, Kazuma OHARA, Takuma AMADA: VERIFICATION APPARATUS, MULTIPARTY COMPUTATION VERIFICATION SYSTEM, AND METHOD AND PROGRAM FOR VERIFYING MULTIPARTY COMPUTATION EXECUTABLE CODE. 20220092172.
  • NEC Corporation. Hikaru TSUCHIDA, Toshinori ARAKI, Kazuma OHARA, Takuma AMADA: INFORMATION PROCESSING APPARATUS, SECURE COMPUTATION METHOD, AND PROGRAM. 20220129567.
  • NEC Corporation. Hikaru TSUCHIDA, Toshinori ARAKI, Kazuma OHARA, Takuma AMADA: INFORMATION PROCESSING APPARATUS, SECURE COMPUTATION METHOD, AND PROGRAM. 20220141000.
  • NEC Corporation. Hikaru TSUCHIDA, Kazuma OHARA, Toshinori ARAKI, Takuma AMADA: SECURE COMPUTATION SERVER, TRAIL MANAGEMENT METHOD, AND PROGRAM. 20220261507.
  • NEC Corporation. Hikaru TSUCHIDA, Toshinori ARAKI, Kazuma OHARA: SECRET COMPUTATION SYSTEM, SECRET COMPUTATION SERVER, AUXILIARY SERVER, SECRET COMPUTATION METHOD, AND PROGRAM. 20220329596.
  • NEC Corporation, BAR-ILAN UNIVERSITY. Toshinori ARAKI, Kazuma OHARA, Hikaru TSUCHIDA, Jun FURUKAWA, Binyamin PINKAS: COMPUTATION SYSTEM AND COMPUTATION METHOD. 20220343027.
  • NEC Corporation. Hikaru TSUCHIDA: SHUFFLE SYSTEM, SHUFFLE METHOD, AND PROGRAM. 20220368723.
  • NEC Corporation. Hikaru TSUCHIDA: SHUFFLE SYSTEM, SHUFFLE METHOD, AND PROGRAM. 20220399991.
  • NEC Corporation. Hikaru TSUCHIDA: SECURE COMPUTATION SYSTEM, SECURE COMPUTATION SERVER APPARATUS, SECURECOMPUTATION METHOD, AND SECURE COMPUTATION PROGRAM. 20230046000.

Lectures

  • The Eighth Symposium on Biometrics, Recognition and Authentication, S1-3.
  • Workshop on Cryptography and Information Security 2019, WCIS 2019
  • Joint Research Meeting of the Institute of Math-for-Industry, Kyushu University. Exploring Mathematical and Practical Principles of Secure Computation and Secret Sharing.

Academic/professional career summary

Academic

March 2014
Bachelor of Science, Tokyo University of Science
March 2016
Master of Engineering, University of Tsukuba
March 2023
Doctor of Philosophy in Engineering, University of Tsukuba

Professional

April 2016
NEC