A Plug-and-Play Long-Range Defense System for Proof-of-Stake Blockchains

ePrint Report: A Plug-and-Play Long-Range Defense System for Proof-of-Stake Blockchains

Lucien K. L. Ng, Panagiotis Chatzigiannis, Duc V. Le, Mohsen Minaei, Ranjit Kumaresan, Mahdi Zamani

In recent years, many blockchain systems have progressively transitioned to proof-of-stake (PoS) con- sensus algorithms. These algorithms are not only more energy efficient than proof-of-work but are also well-studied and widely accepted within the community. However, PoS systems are susceptible to a particularly powerful "long-range" attack, where an adversary can corrupt the validator set retroactively …

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