Adversarially Robust Streaming Algorithms via Differential Privacy

Haim Kaplan
Yishay Mansour
Journal of the ACM, 69(6)(2022), pp. 1-14


A streaming algorithm is said to be adversarially robust if its accuracy guarantees are maintained even when the data stream is chosen maliciously, by an adaptive adversary. We establish a connection between adversarial robustness of streaming algorithms and the notion of differential privacy. This connection allows us to design new adversarially robust streaming algorithms that outperform the current state-of-the-art constructions for many interesting regimes of parameters.