Low-Cost Attacks on Ethereum 2.0 by Sub-1/3 Stakeholders

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Low-Cost Attacks on Ethereum 2.0 by Sub-1/3 Stakeholders

Michael NeuderDaniel J. MorozRithvik RaoDavid C. Parkes

We outline two dishonest strategies that can be cheaply executed on the Ethereum 2.0 Beacon Chain, even by validators holding less than one-third of the total stake: malicious chain reorganizations ('reorgs') and finality delays.

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