Blockchain Validation

Definition ∞ Blockchain validation is the process by which new transactions are verified and added to a blockchain ledger. This verification ensures the integrity and security of the distributed ledger, confirming that transactions are legitimate and have not been tampered with. It is a fundamental mechanism that underpins the trustworthiness of decentralized systems.
Context ∞ Discussions around blockchain validation frequently center on the efficiency and security trade-offs of different consensus mechanisms, such as Proof-of-Work versus Proof-of-Stake. News reports may highlight upgrades to protocols aimed at optimizing validation speeds or reducing the energy consumption associated with these processes. Understanding the nuances of validation is key to assessing the scalability and environmental impact of various blockchain networks.