@InProceedings{zizhenliu_405,
    title = {SASH: Efficient Secure Aggregation Based on SHPRG For Federated Learning},
    author = {Liu, Zizhen and Chen, Si and Ye, Jing and Fan, Junfeng and Li, Huawei and Li, Xiaowei},
    abstract = {To prevent private training data leakage in Federated Learning systems, we propose a novel secure aggregation scheme based on seed homomorphic pseudo-random generator (SHPRG), named SASH. SASH leverages the homomorphic property of SHPRG to simplify the masking and demasking scheme, which for each of the clients and for the server, entails a overhead linear w.r.t model size and constant w.r.t number of clients. We prove that even against worst-case colluding adversaries, SASH preserves training data privacy, while being resilient to dropouts without extra overhead. We experimentally demonstrate SASH significantly improves the efficiency to 20× over baseline, especially in the more realistic case where the numbers of clients and model size become large, and a certain percentage of clients drop out from the system.}
}

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