A security property is a characteristic or guarantee that a system maintains under adversarial conditions, ensuring its integrity, confidentiality, or availability. In blockchain, examples include immutability of the ledger, resistance to double-spending, and censorship resistance for transactions. These properties are formal statements about a system’s behavior that are expected to hold true despite attempts to compromise it. They are fundamental to the trust model of decentralized networks.
Context
Security properties are central to the design and analysis of all blockchain protocols, as they define the foundational assurances provided to users. A key discussion involves proving these properties formally through cryptographic and distributed systems theory, and verifying their implementation in code. Future developments aim to enhance existing security properties and introduce new ones, such as stronger privacy guarantees, while maintaining scalability and decentralization.
This research introduces Accountable Safety, a new PoS property that guarantees finality or provides cryptographic proof of validator misbehavior under minimal synchrony.
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