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Understanding blockchain technology is key to grasping how digital transactions are made secure and transparent. At its core, a blockchain is a decentralized, distributed ledger that records transactions across many computers. Each block in the chain contains data, like transaction details, a unique identifier, and a timestamp. Once a block is added, it’s cryptographically linked to the previous one, forming an immutable chain. This distributed nature means there’s no single point of failure and makes it incredibly difficult to tamper with recorded information. This digital ledger system underpins cryptocurrencies like Bitcoin but also has wider applications in supply chain management, healthcare records, and secure data sharing. The security and transparency provided by this decentralized network are its main benefits, ensuring data integrity without needing a central authority.