Blockchain technology is a decentralized digital ledger system that records transactions across multiple computers in a secure, transparent, and change-resistant manner. Each transaction, or “block,” is linked to a previous block, forming a chain. This blockchain is maintained by a network of computers (nodes) that validate and timestamp transactions via a consensus protocol. Key features of blockchain include immutability, meaning that once data is recorded, it is extremely difficult to change; transparency, because all participants can view the entire transaction history; and security, ensured by cryptographic techniques. Blockchain finds applications beyond cryptocurrencies, including supply chain management, voting systems, and smart contracts, providing a promising framework for decentralized and trustless solutions across various industries.

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