In this presentation, Ittay Eyal (Technion and IC3) covers two topics. The first is a formalization of the classical authentication problem that reveals surprising results. These apply to digital assets, but also to authentication in general. The second topic is blockchain incentives, focusing on Colordag. Colordag is a reward distribution scheme in DAGs resilient to up to 50% rational miners. Colordag provably makes correct blockdag extension a best response in almost all executions, making it useful for a variety of DAG-based protocols.
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