Strong validity is a property of a distributed system or cryptographic protocol indicating that all honest participants agree on the correctness of an output or state, and that this agreement accurately reflects the input or process. In blockchain, strong validity ensures that all accepted transactions are legitimate and adhere to protocol rules. It means that even with malicious actors, the system reliably produces accurate and consistent results. This characteristic is crucial for maintaining data integrity and trust.
Context
Strong validity is a fundamental security requirement for any reliable digital asset system, ensuring that the ledger accurately records all legitimate transactions. It is a key metric in evaluating the security guarantees of consensus algorithms and smart contract execution environments. News reports on protocol vulnerabilities or exploits often reveal weaknesses in maintaining strong validity, underscoring its importance for the trustworthiness of decentralized applications.
The Random Asynchronous Model replaces adversarial scheduling with a random one, unlocking deterministic BFT consensus protocols previously deemed impossible.
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