Blockchain

A distributed, immutable digital ledger that records transactions across a network of computers without a central authority.

A blockchain is a chain of data blocks linked using cryptographic hashes. Each block contains a batch of transactions, a timestamp, and a reference to the previous block, making the history tamper-proof.

Why Blockchain Matters

**Immutability**: Once recorded, data cannot be altered without network consensus
**Transparency**: Anyone can verify transactions on public blockchains
**Decentralization**: No single point of failure or control
**Trustless**: Parties can transact without trusting each other

Beyond Crypto

Blockchain technology is used in supply-chain tracking, digital identity, voting systems, and tokenized real-world assets — not just cryptocurrency.

FAQ

Is blockchain the same as Bitcoin?

No. Blockchain is the underlying technology; Bitcoin is one application built on it. Many other blockchains exist, including Ethereum, Solana, and Cardano.

Can blockchain be hacked?

The blockchain itself is extremely difficult to hack due to decentralization and cryptography. Most 'hacks' target exchanges, wallets, or smart contracts — not the blockchain protocol.