Proof of Work Scheme

Definition ∞ A Proof of Work scheme is a consensus mechanism used in distributed networks to validate transactions and create new blocks in a blockchain. Participants, known as miners, compete to solve a computationally intensive cryptographic puzzle. The first miner to find a solution broadcasts it, and if verified by the network, they receive a reward, thereby securing the ledger.
Context ∞ Proof of Work schemes, famously utilized by Bitcoin, are frequently discussed in crypto news regarding network security, energy consumption, and scalability limitations. Debates often surround its environmental impact and its effectiveness compared to alternative consensus mechanisms like Proof of Stake. Regulatory bodies and environmental groups closely scrutinize the energy demands of these schemes, influencing public perception and policy.