[Resource Topic] 2024/1235: Blue fish, red fish, live fish, dead fish

Welcome to the resource topic for 2024/1235

Title:
Blue fish, red fish, live fish, dead fish

Authors: Victor Shoup

Abstract:

We show that the DAG-based consensus protocol Tusk [DKSS22] does not achieve liveness, at least under certain reasonable assumptions on the implementation that are consistent with its specification. In addition, we give a simple 2-round variation of Tusk with lower latency and strong liveness properties, but with suboptimal resilience. We also show that another 2-round protocol, GradedDAG [DZX+24], which has optimal resilience, also has liveness problems analogous to Tusk.

ePrint: https://eprint.iacr.org/2024/1235

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