Definition ∞ Selfish mining defense refers to strategies or protocol adjustments designed to counteract selfish mining attacks, where a miner secretly mines blocks to gain an unfair advantage. These defenses aim to ensure that all valid blocks are broadcast promptly and that honest miners receive their proportional rewards. It maintains the integrity and fairness of the consensus mechanism.
Context ∞ The development of robust selfish mining defenses is critical for the security and decentralization of Proof-of-Work blockchains, as such attacks can undermine network stability. Protocol improvements, such as GHOST or similar block selection rules, are frequently implemented to mitigate these vulnerabilities. Ongoing research continually seeks more effective methods to prevent and deter selfish mining.
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