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Introduction to distributed ledger technology
A blockchain is a distributed, immutable ledger that records transactions across a network of computers. Each block contains a cryptographic hash of the previous block, creating an unbreakable chain.
Key properties:
• Decentralization — No single entity controls the network
• Immutability — Data cannot be changed once confirmed
• Transparency — All transactions are publicly verifiable
• Security — Cryptography protects data integrity