Active Adversary Model

Definition ∞ An active adversary model describes a security framework where an attacker can actively interfere with network operations. This includes altering, delaying, or deleting messages, rather than merely observing them. Such a model considers an attacker possessing significant computational power and strategic capability to compromise system integrity. It assesses system robustness against malicious entities that aim to disrupt or corrupt data and processes.
Context ∞ In cryptocurrency news, discussions surrounding blockchain security often reference active adversary models when evaluating protocol resilience. This model is crucial for understanding the potential vulnerabilities of decentralized systems to sophisticated attacks, particularly in proof-of-stake networks or during cross-chain transactions. News reports frequently analyze how new cryptographic designs or consensus mechanisms mitigate risks posed by such potent attackers.