Attack Cost Multiplier

Definition ∞ An Attack Cost Multiplier quantifies the economic effort needed to compromise a blockchain network. It represents the ratio between resources an attacker must expend and the potential gain from a successful attack. A higher multiplier indicates a more secure system, as the financial barrier to disruption becomes substantial. This metric is crucial for evaluating the economic security of various consensus mechanisms.
Context ∞ Discussions around Attack Cost Multiplier frequently arise when assessing the resilience of proof-of-work or proof-of-stake blockchains against 51% attacks. News reports often cite this factor when comparing the security models of different digital assets. A rising Attack Cost Multiplier suggests increasing network robustness, while a declining one might signal heightened vulnerability, prompting concern among participants.