Blockchain
CryptoGlossary term
Definition
A distributed digital ledger that records transactions across a network of computers in a way that makes the data nearly impossible to alter retroactively. Each block contains a set of transactions and is cryptographically linked to the previous block, forming a chain. This technology provides transparency, security, and decentralization without requiring a central authority.
Related terms
- Smart ContractA self-executing program stored on a blockchain that automatically enforces the terms of an agreement when predetermined conditions are met. Smart contracts eliminate the need for intermediaries by running code that is transparent and cannot be altered once deployed. They are the foundation of DeFi applications, NFTs, and many other blockchain-based services.
- Hash RateA measure of the computational power being used to mine and process transactions on a Proof of Work blockchain network. It represents the number of hash calculations a miner or the entire network can perform per second. A higher hash rate indicates a more secure network because it would require more computing power for a bad actor to attack it.
- Proof of WorkA consensus mechanism that requires miners to solve computationally intensive mathematical puzzles to validate transactions and add new blocks to the blockchain. It was the first consensus method used in blockchain technology and remains the mechanism behind Bitcoin. While highly secure, Proof of Work is criticized for its significant energy consumption and environmental impact.
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