Selective Security Model

Definition ∞ A selective security model defines a cryptographic system’s security properties against specific, predetermined types of attacks or adversaries. Unlike a fully universal security model, it focuses on providing guarantees under particular conditions or against certain threat profiles. This approach can lead to more efficient protocols by tailoring security measures to known risks, rather than attempting to secure against all possible threats. It balances security with performance.
Context ∞ In blockchain protocol design, a selective security model might be adopted to optimize for specific use cases or resource constraints, accepting certain trade-offs for performance gains. Discussions often revolve around whether a protocol’s chosen security model is sufficient for its intended application, particularly concerning the types of attacks it can withstand. News related to protocol audits or new cryptographic primitives sometimes clarifies the specific security models they operate under.