Constant committee size refers to a fixed number of participants responsible for specific tasks in a decentralized network. This architectural choice in blockchain protocols means the group of validators or nodes responsible for block production or transaction verification maintains an unchanging member count. Such a design aims to provide predictable security assurances and consistent network performance. It contrasts with dynamic committee structures where membership can vary, often balancing decentralization with efficiency considerations.
Context
Discussions around constant committee size frequently arise in sharding implementations and proof-of-stake systems, where maintaining security against malicious actors is paramount. Its selection often represents a trade-off between network scalability and the overhead associated with committee management. Future protocol upgrades often consider how to maintain security guarantees while potentially adjusting committee dynamics.
Foundational research replaces probabilistic committee security with deterministic bounds, enabling smaller, more efficient consensus groups for scalable systems.
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