NISHIDE Takashi

Affiliation
Institute of Systems and Information Engineering
Official title
Associate Professor
Research keywords
Cryptography and Information Security
Research projects
完全準同型暗号の多様な実利用シナリオ適応に向けた機能拡張2025-04 -- 2030-03西出隆志日本学術振興会/Grant-in-Aid for Scientific Research (B)18,460,000Yen
暗号に基づくプログラム実行回数制限機能の構成とその応用2023-07 -- 2026-03NISHIDE TakashiJapan Society for the Promotion of Science/Grant-in-Aid for Challenging Research (Exploratory)6,240,000Yen
準同型暗号の高速化に関する共同研究2022-06 -- 2023-03西出隆志KDDI Research, Inc./1,000,000Yen
Secure Outsourcing of Program Execution with Private Inputs2020-04 -- 2023-03NISHIDE TakashiJapan Society for the Promotion of Science/Grant-in-Aid for Scientific Research (C)4,290,000Yen
暗号に基づくワンタイムプログラムの実現2018-04 -- 2019-03NISHIDE TakashiTelecommunications Advancement Foundation/Research Grant1,130,000Yen
Improving functionality and efficiency of secure computation by using structures of problems2017-04 -- 2020-03NISHIDE TakashiJapan Society for the Promotion of Science/Grant-in-Aid for Scientific Research (C)4,420,000Yen
セキュリティ技術の調査研究2016-09 -- 2916-06Takashi NISHIDEHitachi Solutions, Ltd./Joint Project
セキュリティ技術の調査研究2015-08 -- 2016-03Takashi NISHIDEHitachi Solutions, Ltd./Joint Project
セキュリティ技術の調査研究2014-08 -- 2015-03Takashi NISHIDEHitachi Solutions, Ltd./Joint Project
Cryptographic Techniques for Both Protecting and Utilizing Confidential Data2014-04 -- 2017-03NISHIDE TakashiJapan Society for the Promotion of Science/Grant-in-Aid for Scientific Research (C)4,810,000Yen
more...
Degree
2008-09Dr. of EngineeringThe University of Electro-Communications
Honors & Awards
2021-09電子情報通信学会基礎・境界ソサイエティ貢献賞2021年暗号と情報セキュリティ小特集号編集幹事としての貢献
Articles
  • Publicly Verifiable Multi-server Homomorphic Secret Sharing
    XU Ye; NISHIDE Takashi
    International Conference on Information Security Practice and Experience (ISPEC), 2025-11
  • Lattice-based Multi-key Homomorphic Signatures Forward-unforgeable against Signing Key Leakage
    XU Ye; NISHIDE Takashi
    IACR Communications in Cryptology/2(2), 2025-08
  • VeHSS: Two-server Verifiable Homomorphic Secret Sharing Leveraging SIMD Operations
    XU Ye; NISHIDE Takashi
    Journal of Information Processing, Information Processing Society of Japan, 2025-10
  • Verifiable Homomorphic Secret Sharing for SIMD Operations
    Xu Ye; NISHIDE Takashi
    International Symposium on Computing and Networking Workshops (CANDARW)/pp.314-320, 2024-11
  • Local Curvature Smoothing with Stein's Identity for Efficient Score Matching
    Osada Genki; Shing Makoto; NISHIDE Takashi
    NeurIPS, 2024-12
  • Faster Homomorphic Evaluation of Arbitrary Bivariate Integer Functions via Homomorphic Linear Transformation
    Nakashima Akira; Hayashi Takuya; Tsuchida Hikaru; Sugi...
    Workshop on Encrypted Computing & Applied Homomorphic Cryptography (WAHC), 2024-10
  • Time-Memory Trade-off Algorithms for Homomorphically Evaluating Look-up Table in TFHE
    Narisada Shintaro; Okada Hiroki; Fukushima Kazuhide; N...
    Workshop on Encrypted Computing & Applied Homomorphic Cryptography (WAHC), 2024-10
  • Secure Five-party Computation with Private Robustness and Minimal Online Communication
    Tsuchida Hikaru; Nishide Takashi
    International Conference on Provable and Practical Security (ProvSec), 2024-09
  • NISQを仮定した量子ワンタイムメモリの提案
    関井恭介; 西出 隆志
    暗号と情報セキュリティシンポジウム(SCIS), 2024-01
  • 整数型準同型暗号におけるHomomorphic Linear Transformationを用いた任意二変数関数計算
    中島明; 林卓也; 土田光; 杉崎行優; 森健吾; 西出 隆志
    暗号と情報セキュリティシンポジウム(SCIS), 2024-01
  • Understanding Likelihood of Normalizing Flow and Image Complexity through the Lens of Out-of-Distribution Detection
    Osada Genki; Takahashi Tsubasa; Nishide Takashi
    Annual AAAI Conference on Artificial Intelligence, Special Track on Safe, Robust and Responsible AI/38(19)/pp.21492-21500, 2024-02
  • GPU Acceleration of High-Precision Homomorphic Computation Utilizing Redundant Representation
    Narisada Shintaro; Okada Hiroki; Fukushima Kazuhide; K...
    11th Workshop on Encrypted Computing & Applied Homomorphic Cryptography (WAHC)/pp.1-9, 2023-11
  • Out-of-Distribution Detection with Reconstruction Error and Typicality-based Penalty
    Osada Genki; Takahashi Tsubasa; Ahsan Budrul; Nishide ...
    Proceedings of 2023 IEEE/CVF Winter Conference on Applications of Computer Vision (WACV)/pp.5540-5552, 2023-10
  • Efficient Homomorphic Evaluation of Arbitrary Uni/Bivariate Integer Functions and Their Applications
    Maeda Daisuke; Morimura Koki; Narisada Shintaro; Fukus...
    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences/E107--A(3)/pp.234-247, 2024-03
  • Accelerating Polynomial Evaluation for Integer-wise Homomorphic Comparison and Division
    Morimura Koki; Maeda Daisuke; Nishide Takashi
    Journal of Information Processing, Information Processing Society of Japan/31/pp.288-298, 2023-05
  • Efficient Homomorphic Evaluation of Arbitrary Bivariate Integer Functions
    Maeda Daisuke; Morimura Koki; Nishide Takashi
    Workshop on Encrypted Computing & Applied Homomorphic Cryptography (WAHC)/pp.13-22, 2022-11
  • Out-of-Distribution Detection with Reconstruction Error and Typicality-based Penalty
    Osada Genki; Takahashi Tsubasa; Ahsan Budrul; Nishide Ta...
    Winter Conference on Applications of Computer Vision (WACV)/pp.5540-5552, 2023-01
  • Square Table Lookup Multiparty Computation Protocol
    Wang Zhongqi; Fuse Keita; Nishide Takashi
    International Symposium on Computing and Networking Workshops (CANDARW)/pp.392-395, 2022-11
  • PoS Blockchain-Based Forward-Secure Public Key Encryption with Immutable Keys and Post-Compromise Security Guarantees
    Nuta Seiya; Schuldt Jacob C.N.; Nishide Takashi
    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES/E106A(3)/pp.212-227, 2023-03
  • Constant-Round Fair SS-4PC for Private Decision Tree Evaluation
    Tsuchida Hikaru; Nishide Takashi
    IEICE Trans. Fundamentals/E105--A(9)/pp.1270-1288, 2022-09
  • 完全準同型暗号における整数型平文空間の一拡張手法とその演算
    前田大輔; 森村洸生; 成定真太郎; 福島和英; 西出 隆志
    暗号と情報セキュリティシンポジウム(SCIS), 2023-01
  • 準同型暗号TFHE上の任意精度演算のための冗長表現による多並列化
    成定真太郎; 福島和英; 清本晋作; 西出 隆志
    暗号と情報セキュリティシンポジウム(SCIS), 2023-01
  • Secure Multi-key Homomorphic Signatures against Insider Corruption
    Xu Ye; Nishide Takashi
    暗号と情報セキュリティシンポジウム(SCIS), 2023-01
  • How to Compute Multiplication in FHE Encoding Integer Plaintexts into Polynomials
    王中琦; 梨本健斗; 西出 隆志
    暗号と情報セキュリティシンポジウム(SCIS), 2023-01
  • 関数型暗号を用いた顔認証方式の鍵分散による安全性向上
    伊藤悠椰; 西出 隆志
    暗号と情報セキュリティシンポジウム(SCIS), 2023-01
  • more...
Books
  • 暗号と情報セキュリティ
    西出 隆志; 岡本 栄司
    リスク工学シリーズ8巻/コロナ社/pp.1-103, 2016-05
Conference, etc.
  • Outsourced Private Function Evaluation with Privacy Policy Enforcement
    Kunihiro Noboru; Lu Wen-Jie; Nishide Takashi; Sakuma Jun
    IEEE TrustCom2018/2018-08--2018-08
  • API仕様書の説明文を用いたマルウェア動的解析手法
    長田元気; 面和成; 西出隆志
    暗号と情報セキュリティシンポジウム(SCIS)/2018-01-23--2018-01-26
  • Network Intrusion Detection based on Semi-Supervised Variational Auto-Encoder
    Osada Genki; Omote Kazumasa; Nishide Takashi
    The 22nd European Symposium on Research in Computer Security (ESORICS)/2017-09-11--2017-09-15
  • Improved Proxy Re-encryption Scheme for Symmetric Key Cryptography
    Syalim Amril; Nishide Takashi; Sakurai Kouichi
    International Workshop on Big Data and Information Security (IWBIS)/2017-09-23--2017-09-24
  • Committed AND Protocol Using Three Cards with More Handy Shuffle
    Shinagawa Kazumasa; Nuida Koji; Nishide Takashi; Hanao...
    3rd International Symposium on Information Theory and Its Applications (ISITA)/2016-10-30--2016-11-02
  • Revocable Decentralized Multi-Authority Functional Encryption
    Tsuchida Hikaru; Nishide Takashi; Okamoto Eiji; Kim K...
    17th International Conference on Cryptology in India (INDOCRYPT)/2016-12-11--2016-12-14
  • Size-Hiding Computation for Multiple Parties
    Shinagawa Kazumasa; Nuida Koji; Nishide Takashi; Hanaoka ...
    22nd Annual International Conference on Theory and Application of Cryptology and Information Security (ASIACRYPT)/2016-12-04--2016-12-08
  • Searchable Symmetric Encryption Supporting Queries with Multiple-Character Wildcards
    Zhao Fangming; Nishide Takashi
    10th International Conference on Network and System Security (NSS)/2016-09-28--2016-09-30
  • Software Implementation of a Pairing Function for Public Key Cryptosystems
    Kanbara Yusuke; Teruya Tadanori; Kanayama Naoki; Nishi...
    5th International Conference on IT Convergence and Security (ICITCS)/2015-08-24--2015-08-27
  • Software Implementation of Ciphertext-Policy Functional Encryption with Simple Usability
    Hasegawa Keisuke; Kanayama Naoki; Nishide Takashi; Oka...
    5th International Conference on IT Convergence and Security (ICITCS)/2015-08-24--2015-08-27
  • Constructions of Fail-Stop Signatures for Multi-Signer Setting
    Kitajima Nobuaki; Yanai Naoto; Nishide Takashi; Hanaok...
    10th Asia Joint Conference on Information Security (AsiaJCIS 2015)/2015-05-24--2015-05-26
  • Multi-party Computation with Small Shuffle Complexity Using Regular Polygon Cards
    Shinagawa Kazumasa; Mizuki Takaaki; Schuldt Jacob C. N.; Nui...
    9th International Conference on Provable Security (ProvSec)/2015-11-24--2015-11-26
Teaching
2024-10 -- 2025-02Advanced Seminar in Risk EngineeringUniversity of Tsukuba.
2024-04 -- 2024-08Advanced Seminar in Risk EngineeringUniversity of Tsukuba.
2024-08 -- 2024-09Advanced Course in Network SecurityUniversity of Tsukuba.
2024-04 -- 2024-08Internship A in Risk and Resilience Engineering in Doctoral ProgramUniversity of Tsukuba.
2024-10 -- 2025-02Internship A in Risk and Resilience Engineering in Doctoral ProgramUniversity of Tsukuba.
2024-10 -- 2025-02Risk Case StudyUniversity of Tsukuba.
2024-04 -- 2024-08Risk Case StudyUniversity of Tsukuba.
2024-11 -- 2024-12Introduction to Information Science:Information SystemsUniversity of Tsukuba.
2024-10 -- 2025-02Internship B in Risk and Resilience Engineering in Doctoral ProgramUniversity of Tsukuba.
2024-04 -- 2024-08Internship B in Risk and Resilience Engineering in Doctoral ProgramUniversity of Tsukuba.
more...
Other educational activities
2017-07 -- 2017-07教員免許状更新講習筑波大学
Talks
  • ワンタイムプログラムとその応用
    西出 隆志
    情報理論とその応用シンポジウム 特別セッション(情報セキュリティ)/2018-12-21
Professional activities
2025-03 -- 2025-07International Conference on Information and Communications Security (ICICS 2025)Program Committee member
2025-04 -- 2025-07Blockchain and Internet of Things Conference (BIOTC 2025)Program Chair
2024-04 -- 2025-01暗号と情報セキュリティシンポジウム(SCIS)2025実行委員
2024-04 -- 2025-03International Symposium on Information Theory and Its Applications (ISITA) 2024Technical Program Committee member
2024-04 -- 2025-03電子情報通信学会英文誌特集号編集委員
2021-04 -- (current)電子情報通信学会ソサイエティ論文誌編集委員会査読委員
2021 -- (current)International Conference on Security & Privacy (ICSP 2021)Program Committee member
2020-04 -- 2020-10International Conference on Security & Privacy (ICSP 2020)Program Committee member
2020-04 -- 2020-10International Symposium on Information Theory and Its Applications (ISITA)2020Technical Program Committee member
2019-06 -- 2020-08The Institute of Electronics, Information and Communication Enineers (IEICE)英文論文誌A 「暗号と情報セキュリティ小特集号」(2021年度出版) 編集幹事
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University Management
2025-04 -- 2028-03情報科学類知能情報メディア主専攻世話人
2025-04 -- 2027-03情報科学類広報企画委員
2025-04 -- 2026-03リスク・レジリエンス工学学位P総務委員
2025-04 -- 2026-03リスク・レジリエンス工学学位Pコンソーシアム対応委員会
2025-04 -- 2026-03リスク・レジリエンス工学学位P達成度評価チェック委員会
2025-04 -- 2026-03リスク・レジリエンス工学学位P予算委員
2024-04 -- 2025-03リスク・レジリエンス工学学位P、学生支援対応チーム
2024-04 -- 2025-03リスク・レジリエンス工学学位P、達成度評価実施委員会
2024-04 -- 2025-03リスク・レジリエンス工学学位P、M2学年主担当
2023-04 -- 2025-03リスク・レジリエンス工学学位P、学務委員会
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(Last updated: 2025-09-02)