Authors

Fuyuki Kitagawa

Publications 2

Preprint Open access

Quantum Leakage Resilience of Shamir Secret Sharing

Rishabh Batra, Fuyuki Kitagawa, Ryo Nishimaki et al. · 2026

We initiate the study of quantum leakage resilience of unmodified Shamir secret sharing over prime fields. A well-studied leakage model for Shamir's secret sharing classically is single-bit local leakage from each share. We consider its quantum analogue where, for each party, a local leakage channel takes as input the …

Preprint Open access

I Prove, Therefore I Am: Spatiotemporal Multi-Party Computation

Ziqing Guo, Fuyuki Kitagawa, Xiao Liang · 2026

Secure multiparty computation (MPC) enables mutually distrustful parties to compute on private digital inputs. We initiate the study of spatiotemporal MPC, extending this paradigm to functionalities whose inputs additionally depend on physical facts such as the parties' locations, times, or trajectories. Such protocols …

Co-authors