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Abstract: The inherent difficulty of maintaining stateful environments over long periods of time gave rise to the paradigm of serverless computing, where mostly-stateless components are deployed on demand to handle computation tasks, and are teared down once their task is complete. Serverless architecture could offer the added benefit of improved resistance to targeted denial-of-service attacks. Realizing such protection, requires that the protocol only uses stateless parties. Perhaps the most famous example of this style of protocols is the Nakamoto consensus protocol used in Bitcoin. We refer to this stateless property as the You-Only-Speak-Once (YOSO) property, and initiate the formal study of it within a new YOSO model. Our model is centered around the notion of roles, which are stateless parties that can only send a single message. Furthermore, we describe several techniques for achieving YOSO MPC; both computational and information theoretic. The talk will be self contained.
NIST Workshop on Multi-Party Threshold Schemes (MPTS) 2020. https://csrc.nist.gov/events/2020/mpts2020
Based on joint works with: Fabrice Benhamouda, Craig Gentry, Sergey Gorbunov, Shai Halevi, Hugo Krawczyk, Chengyu Lin, Bernardo Magri, Jesper Nielsen, Leo Reyzin, Sophia Yakoubov.
NIST Workshop on Multi-Party Threshold Schemes 2020Starts: November 04, 2020
Security and Privacy: cryptography