Validator Collusion

Definition ∞ Validator collusion occurs when a group of validators in a proof-of-stake blockchain conspire to act maliciously, such as censoring transactions, double-spending, or manipulating the consensus process. This collective action undermines the integrity and security of the network. Robust protocol design and economic incentives are crucial for deterring such coordinated behavior. It represents a significant threat to decentralized governance.
Context ∞ News concerning the security and decentralization of proof-of-stake blockchains frequently discusses the risk of validator collusion. Reports on protocol upgrades or changes to staking mechanisms often aim to reduce this vulnerability. The economic penalties for malicious behavior, known as slashing, are designed to prevent such occurrences. Maintaining a diverse and distributed validator set is critical for mitigating this risk.