Differential Privacy

Example of Research

Based on the $f$-divergence, we proved a novel composition theorem of an adaptive composition of $n$ mechanisms all satisfying $\epsilon$-DP. Numerical examples show that there are cases where the proposed composition theorem is tighter than the previous composition theorems.

Shota SAITO, Koji CHIDA, Osamu TAKAKI, A Composition Theorem via f-Divergence Differential Privacy, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 論文ID 2024EAP1123　Link

Information-Theoretic Study on Privacy-Utility Tradeoff

Example of Research

Shota SAITO, Toshiyasu MATSUSHIMA, "Upper Bound on Privacy-Utility Tradeoff Allowing Positive Excess Distortion Probability" in IEICE TRANSACTIONS on Fundamentals, vol. E105-A, no. 3, pp. 425-427, March 2022, doi: 10.1587/transfun.2021TAL0002. 　Link