Node Validation

Definition ∞ Node validation is the process by which network participants, known as nodes, verify the legitimacy of transactions and blocks on a blockchain. These nodes ensure that all proposed changes to the ledger adhere to the protocol’s rules and cryptographic standards. Successful validation confirms the integrity of the blockchain and prevents fraudulent activities. This distributed verification mechanism underpins the security of decentralized networks.
Context ∞ The integrity and decentralization of node validation remain critical discussion points in blockchain news, particularly concerning network security and censorship resistance. Debates often focus on the economic incentives for running nodes and the potential for centralization if validation power concentrates among a few entities. Ongoing protocol upgrades frequently aim to enhance the efficiency and accessibility of node participation.