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Archive / INF Seminars / INF_2025_05_15_ChenDaLiuZhang

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	Distributed Cryptography with Dynamic Committees

Host: Prof. Stefan Wolf

Thursday

15.05

USI Campus EST, Room D0.03

11:00 - 12:00


	Chen-Da Liu-Zhang Lucerne University of Applied Sciences and Arts and Web3 Foundation

Abstract: Protocols with dynamic committees have emerged over the past decade to enable scalable distributed computation while remaining secure against adaptive denial-of-service (DoS) attacks, with Bitcoin and Algorand among the most notable examples.This talk will cover recent advances in distributed cryptography with dynamic committees, including a unified framework for designing such protocols and new approaches to consensus and secure computation in this setting. The presentation will draw on results from recent papers published at PODC 2021, Eurocrypt 2022 and 2025, Crypto 2023, TCC 2024 and Financial Cryptography 2024.

Biography: Chen-Da Liu-Zhang is Co-Head of the Information Systems Lab and Blockchain Lab at the Lucerne University of Applied Sciences and Arts, and a Research Scientist at the Web3 Foundation. His research extends applied cryptography and distributed computation to address security and privacy challenges in decentralized environments. His recent work focuses on designing efficient protocols for secure computation over asynchronous networks, secure computation with dynamic committees, scalable consensus protocols, and peer-to-peer networks. Previously, he was a Postdoctoral Fellow at Carnegie Mellon University and NTT Research, and earned his Ph.D. at ETH Zurich.