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Learn about Willow, a novel secure aggregation protocol that enables one-shot client participation in this 40-minute conference talk. Discover how this innovative approach addresses the common synchronization bottlenecks in secure vector summation protocols by allowing clients to send just a single message to the server and join aggregation sessions dynamically without waiting for other participants. Explore the committee-based architecture that facilitates a setup phase before data collection and a verification/decryption phase afterward, while maintaining sub-linear computational costs for committee members that are independent of client vector sizes. Examine how this protocol overcomes the latency and failure issues caused by client dropouts in traditional multi-round protocols, and review experimental results demonstrating competitive performance with state-of-the-art protocols despite offering enhanced flexibility for dynamic client participation. Understand the technical innovations that make asynchronous secure aggregation possible while maintaining strong security guarantees in the single-server model.
