Definition ∞ An external adversary model describes a security framework that considers threats originating from outside a system or network. This model assumes that attackers are external entities attempting to breach defenses to gain unauthorized access or cause disruption. It helps in designing security measures to protect against common cyber threats. This perspective is vital for securing digital infrastructure.
Context ∞ In the context of blockchain and digital assets, the external adversary model is critical for assessing the security of protocols and platforms against malicious actors. A key discussion point revolves around designing systems that are resilient to sophisticated attacks from external parties, such as 51% attacks on proof-of-work networks or denial-of-service attempts. Future developments include continuous refinement of cryptographic techniques and distributed consensus mechanisms to strengthen defenses against evolving external threats.
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