The document discusses the history and development of a new technology called blockchain, which uses cryptography to allow transactions to be securely recorded and verified in a decentralized digital ledger called the blockchain. Blockchain was first implemented in the digital currency Bitcoin, and has since been applied to other applications like digital contracts and digital identity verification due to its ability to securely and anonymously record transactions without a central authority. The technology is still evolving but has significant potential to disrupt many industries by reducing costs and creating new decentralized business models.

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