14 papers · 1 filter
Information-Theoretic Decentralized Secure Aggregation with User Dropouts
Zhou Li, Xiang Zhang, Yizhou Zhao +2
This paper investigates the fundamental limits of information-theoretic decentralized secure aggregation (DSA) with user dropouts. We consider a fully decentralized network where $…
Multi-Server Secure Aggregation with Arbitrary Collusion and Heterogeneous Security Constraints
Zhou Li, Xiang Zhang, Jiguang He +1
We study the fundamental limits of multi-server secure aggregation over a two-hop network where multiple servers, each connected to a disjoint subset of users, jointly compute the…
On Secure Gradient Coding with Uncoded Groupwise Keys
Xudong You, Kai Wan, Xiang Zhang +3
This paper considers a new secure gradient coding problem with uncoded groupwise keys, formalized as a (K, N, N_r, M, S) secure gradient coding model, where a user aims to compute…
Hierarchical Secure Distributed Linearly Separable Computation with Arbitrary Heterogeneous Data Assignment
Chenyi Sun, Ziting Zhang, Kai Wan +1
This paper studies secure distributed linearly separable computation over a three-layer hierarchical network, where clustered users communicate with a central server through relays…
On the Fundamental Limits of Hierarchical Secure Aggregation with Dropout and Collusion Resilience
Zhou Li, Yizhou Zhao, Xiang Zhang +1
We study the fundamental communication limits of information-theoretic secure aggregation in a hierarchical network consisting of a server, multiple relays, and multiple users per…
Information-Theoretic Secure Aggregation over Regular Graphs
Xiang Zhang, Zhou Li, Han Yu +4
Large-scale decentralized learning frameworks such as federated learning (FL), require both communication efficiency and strong data security, motivating the study of secure aggreg…
Optimal Rate Region for Multi-server Secure Aggregation with User Collusion
Zhou Li, Xiang Zhang, Kai Wan +3
Secure aggregation is a fundamental primitive in privacy-preserving distributed learning systems, where an aggregator aims to compute the sum of users' inputs without revealing ind…
Information-Theoretic Secure Aggregation in Decentralized Networks
Xiang Zhang, Zhou Li, Shuangyang Li +3
Motivated by the increasing demand for data security in decentralized federated learning (FL) and stochastic optimization, we formulate and investigate the problem of information-t…
Optimal Key Rates for Decentralized Secure Aggregation with Arbitrary Collusion and Heterogeneous Security Constraints
Zhou Li, Xiang Zhang, Giuseppe Caire
Decentralized secure aggregation (DSA) considers a fully-connected network of users, where each pair of users can communicate bidirectionally over an error-free channel. Each u…
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…
ProxySelect: Frequency Selectivity-Aware Scheduling for Joint OFDMA and MU-MIMO in 802.11ax WiFi
Xiang Zhang, Michail Palaiologos, Christian Bluemm +1
IEEE 802.11ax introduces orthogonal frequency division multiple access (OFDMA) to WiFi to support concurrent transmissions to a larger number of users. As bandwidth continues to gr…
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}\…
Information-Theoretic Decentralized Secure Aggregation with Passive Collusion Resilience
Xiang Zhang, Zhou Li, Shuangyang Li +3
In decentralized federated learning (FL), multiple clients collaboratively learn a shared machine learning (ML) model by leveraging their privately held datasets distributed across…
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…