Private Online Community Detection for Censored Block Models

arXiv:2405.05724v1 Announce Type: cross
Abstract: We study the private online change detection problem for dynamic communities, using a censored block model (CBM). Focusing on the notion of edge differential privacy (DP), we seek to understand the fundamental tradeoffs between the privacy budget, detection delay, and exact community recovery of community labels. We establish the theoretical lower bound on the delay in detecting changes privately and propose an algorithm capable of identifying changes in the community structure, while maintaining user privacy. …

arxiv block budget change communities community cs.cr cs.it cs.si detection differential privacy dynamic edge math.it notion privacy private problem recovery study understand