Quorum Size

Definition ∞ Quorum size refers to the minimum number of participants or votes required in a distributed system to authorize an action, reach a consensus, or validate a transaction. This threshold is critical for maintaining system integrity and preventing malicious actors from unilaterally controlling the network. In blockchain protocols, particularly those using proof-of-stake or delegated consensus mechanisms, a predefined quorum ensures sufficient decentralization and security. It directly influences the system’s resilience against attacks and its operational efficiency.
Context ∞ Quorum size is a frequently discussed parameter in news concerning blockchain governance, network security, and the design of decentralized autonomous organizations. Reports often analyze how different quorum requirements impact decision-making speed and resistance to collusion within various protocols. A key debate involves optimizing quorum size to balance security guarantees with network responsiveness, as an overly high threshold can hinder legitimate operations, while a low one increases vulnerability.