Provable committee size refers to the ability to cryptographically verify the number of participants selected for a specific committee within a decentralized network. This ensures that the committee, often responsible for tasks like block validation or data sampling, meets predetermined security and decentralization criteria. A provable size helps prevent malicious actors from manipulating committee composition. It adds a layer of verifiable integrity to committee-based consensus mechanisms.
Context
Provable committee size is a critical concept in sharded blockchain architectures, where a smaller committee processes a subset of transactions. News reports often discuss how different protocols achieve this provability to maintain security and fairness across shards. The reliability of sharding depends heavily on the cryptographic assurances regarding the size and randomness of these committees.
This research introduces deterministic bounds to cryptographic sortition, replacing probabilistic security with provable committee representation to enhance PoS robustness.
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