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Blockchain is a decentralized digital ledger that securely records transactions across multiple computers. Each record, or "block," is linked to the previous one using cryptographic hashes, forming a chain. This design ensures data integrity and prevents tampering. Blockchain is transparent, immutable, and doesn't require a central authority, making it ideal for cryptocurrencies like Bitcoin. Beyond finance, it's used in supply chain tracking, healthcare, voting systems, and more. Smart contracts—self-executing agreements—enhance its capabilities. While offering increased trust and security, blockchain faces challenges like scalability, regulation, and energy use. Still, it holds vast potential across many industries.
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