3 papers
cs.IT2026
Hierarchical Secure Aggregation with Heterogeneous Security Constraints and Arbitrary User Collusion
Zhou Li, Xiang Zhang, Jiawen Lv +3
In hierarchical secure aggregation (HSA), a server communicates with clustered users through an intermediate layer of relays to compute the sum of users' inputs under two security…
cs.IT2025
Graph-Theoretic Characterization of Noise Capacity of Conditional Disclosure of Secrets
Zhou Li, Siyan Qin, Xiang Zhang +3
In the Conditional Disclosure of Secrets (CDS) problem, Alice and Bob hold inputs and and share a secret. Let $f:\mathcal{X}\times\mathcal{Y}\…
cs.IT2025
The Capacity of Collusion-Resilient Decentralized Secure Aggregation with Groupwise Keys
Zhou Li, Xiang Zhang, Yizhou Zhao +3
This paper investigates the information-theoretic decentralized secure aggregation (DSA) problem under practical groupwise secret keys and collusion resilience. In DSA, users a…