Blockchain
Web3 / blockchain technology
A distributed digital ledger technology that maintains a continuously growing list of transaction records, called blocks, which are linked and secured using cryptographic hashes. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data, creating an immutable chain where altering any record would require changing all subsequent blocks and obtaining network consensus. Originally created by the pseudonymous Satoshi Nakamoto in 2008 to serve as the public transaction ledger for Bitcoin, blockchain technology forms the foundational infrastructure that enables cryptocurrencies to exist and function without traditional banking intermediaries. Cryptocurrencies like Bitcoin, Ethereum, and thousands of other digital coins are built on blockchain networks, where the blockchain serves as the permanent, tamper-proof record of all coin transactions and ownership transfers. The technology operates through a consensus mechanism where the majority of network nodes must validate new transactions before they are permanently recorded, making the system resistant to fraud and tampering while providing transparency and security. This direct connection between blockchain and crypto means that every cryptocurrency transaction is recorded on its respective blockchain, creating a public, verifiable history of all coin movements and enabling the decentralized nature that makes cryptocurrencies possible.
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