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Quorum Based SMR

Definition ∞ Quorum based SMR, or State Machine Replication, is a distributed computing approach that maintains a consistent, ordered log of operations across multiple nodes by requiring a supermajority of participants to agree on each step. This method ensures fault tolerance and data consistency even if some nodes fail or act maliciously. It forms the basis for many distributed ledger technologies.
Context ∞ This consensus mechanism is a foundational concept in various blockchain and distributed system designs, particularly in permissioned networks. Discussions often center on optimizing quorum sizes and communication protocols to balance security with performance. News related to enterprise blockchain solutions or inter-chain communication often references the effectiveness of quorum-based SMR in achieving reliable agreement.

Translucent blue, intricately structured modules are displayed, possibly representing cryptographic primitives or smart contract logic within a decentralized ledger technology DLT framework. These interconnected elements, covered in fine droplets, suggest active data immutability and network consensus processes. A prominent metallic component, resembling a hardware security module HSM or validator node hardware, anchors the system, emphasizing robust digital asset protection and transaction finality. This visual metaphor illustrates the complex interplay of blockchain architecture and security protocols in a Proof-of-Stake PoS environment.

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Strategyproof PoS Protocol Resists Rational Byzantine Collusion Improving Finality

CoBRA transforms Proof-of-Stake to withstand rational adversaries, securing finality against hybrid collusion and ensuring true incentive compatibility.