Multi Party Protocols and Distributed Trust Questions

Design and analysis of protocols that involve multiple independent parties, including secure multiparty computation, threshold cryptography, and consensus or Byzantine tolerant protocols. Candidates should be able to articulate threat models for collusion and malicious participants, techniques such as secret sharing and threshold signatures, fairness and liveness properties, tradeoffs between synchrony and asynchrony, and practical concerns for scalability, performance, and network resilience. Expect evaluation of how to compose multiparty primitives safely and how to reason about distributed trust assumptions in deployed systems.