A synchronous consensus protocol is a method for achieving agreement among distributed network participants where all messages are guaranteed to be delivered within a known, fixed time bound. This assumption simplifies protocol design and allows for deterministic agreement on the order and validity of transactions. Such protocols provide strong guarantees regarding consistency and liveness. They are typically employed in controlled network environments.
Context
The discussion surrounding synchronous consensus protocols in blockchain contexts often contrasts their theoretical security with the practical challenges of achieving strict synchrony in real-world, permissionless networks. News sometimes covers enterprise blockchain solutions that can leverage these protocols due to their controlled operating conditions. The primary debate involves adapting these models for public blockchains, where network delays and adversarial behavior are common, necessitating robust fault tolerance mechanisms.
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