NISHIDE LAB.
Unauthorized access to computers and information leaks can cause serious damage, so building a safe and trustworthy digital society is more important than ever. Today, information technology is everywhere, and while cryptography and security technologies often work quietly in the background, their role is absolutely essential. In fact, many new businesses and services that use networks are only possible thanks to core technologies like cryptography and authentication.
At Laboratory of Cryptography and Information Security, we focus on research in information security with cryptography at the center. Through our work, we aim to support the development of a society where people can use technology with confidence and peace of mind.
Announcement
- 2025/10/14News
- The paper with master's student Kyosuke Sekii, One-Time Memories Secure against Depth-Bounded Quantum Circuits, has been accepted to the international conference Indocrypt.
- 2025/10/01Announcement
- Our lab will hold an info session for third-year undergraduates at University of Tsukuba on the following dates.
– 2025/10/22(Wed) 18:15-19:00 @Laboratory of Advanced Research B, Room 812
– 2025/10/23(Thu) 18:15-19:00 @Laboratory of Advanced Research B, Room 812
– 2025/10/27(Mon) 18:15-19:00 @Laboratory of Advanced Research B, Room 701-1 - 2025/09/25News
- The paper with Ph.D. student WANG Zhongqi and master's student Haruto Fujita, Improving Homomorphic Evaluation of Bivariate Functions in BFV via Tree-Based BSGS with Lazy Relinearization, has been accepted to the international conference CANDAR.
- 2025/09/07News
- The paper with Ph.D. student XU Ye, Publicly Verifiable Multi-server Homomorphic Secret Sharing, has been accepted to the international conference ISPEC.
- 2025/06/10News
- The journal paper with Ph.D. student XU Ye, Lattice-based Multi-key Homomorphic Signatures Forward-unforgeable against Signing Key Leakage, has been accepted to IACR Communications in Cryptology.
- 2025/06/05News
- The journal paper with Ph.D. student XU Ye, VeHSS: Two-server Verifiable Homomorphic Secret Sharing Leveraging SIMD Operations, has been accepted to the Information Processing Society of Japan (IPSJ) Journal.
- 2024/03/01News
- 王中琦さんが筑波大学大学院リスク・レジリエンス工学学位プログラムより優秀賞を受賞しました
- 2024/03/01News
- 関井恭介さんが筑波大学情報学群より学群長賞を受賞しました
- 2024/03/01News
- 2024年度のリスク・レジリエンス工学学位プログラムのOpen Campusは2024/4/21(日)です。本研究室も研究室公開(対面/online両方)を行います。
- 2016/02/19Event
- 岡本栄司教授退職記念事業のご案内