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Blockchain Technology

Blockchain technology is a decentralized data structure that records transactions across a distributed network of computers in sequential, cryptographically linked blocks, making retroactive alteration computationally infeasible without network-wide consensus.

Type: Concept Domain: Technology Mathematics Social Science Engineering

Overview

Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data; consensus mechanisms such as Proof of Work or Proof of Stake govern how participants agree on new entries, replacing institutional trust with mathematical verification and enabling smart contracts — self-executing code that automates enforceable agreements without legal intermediaries.

Why it matters

By enabling trustless coordination among parties who need not know one another, blockchain made a major advance in distributed systems, compressing transaction costs, reducing counterparty risk, and opening new possibilities in finance, supply-chain transparency, and digital ownership that continue to influence regulatory and economic theory.

What it builds on

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