What is Blockchain Technology?

Introduction to Blockchain

Blockchain is a distributed ledger technology that enables secure, transparent, and immutable record-keeping without the need for a central authority. It forms the foundation of cryptocurrencies like Bitcoin and Ethereum, but its applications extend far beyond digital currencies.

How Does It Work?

A blockchain consists of a chain of blocks, each containing a set of transactions. When a new transaction occurs, it is broadcast to a network of computers (nodes) that validate the transaction using consensus mechanisms. Once validated, the transaction is added to a new block, which is then linked to the previous block, creating an unbreakable chain.

Key Properties

Decentralization: No single entity controls the network.

Immutability: Once recorded, data cannot be altered retroactively.

Transparency: All transactions are visible to network participants.

Security: Cryptographic techniques protect data integrity.