51% Attack Vectors

Control

A 51% attack vector represents a scenario where a single entity or colluding group gains control of more than half of a cryptocurrency network’s mining hash rate or staking power, enabling potential manipulation of the blockchain. This dominance permits the attacker to selectively exclude transactions, double-spend coins, or prevent confirmations, disrupting network consensus and potentially altering transaction history. The economic incentive to execute such an attack is often outweighed by the cost of acquiring the necessary resources and the potential damage to the cryptocurrency’s reputation and value, creating a dynamic equilibrium. Mitigation strategies involve increasing network decentralization and implementing robust consensus mechanisms.