Blockchain: a digital ledger connected over time and maintained collectively
Blockchain organizes data into chronologically ordered blocks and connects them using cryptographic proofs. It can be jointly maintained by nodes distributed across different locations to preserve continuous records that are difficult to tamper with.
How blockchain records data
A blockchain is a continuously growing list of digital records. Data is organized into interconnected blocks and protected through cryptographic mechanisms such as hashing. Typical public blockchains have multiple nodes store and verify records, but blockchains can also be deployed in systems with centralized management or permission restrictions; their degree of decentralization cannot be determined solely by their name.
From early prototypes to Bitcoin
The origins of blockchain can be traced back to 20 the century 90 the early years, when Stuart Haber and W. Scott Stornetta used cryptography to protect linked digital documents. 2008 That year, Satoshi Nakamoto published the Bitcoin white paper, after which blockchain became an important underlying component of cryptocurrency networks such as Bitcoin.
Security mechanisms and practical applications
Bitcoin uses proof of work to achieve consensus, enabling a distributed network to continue operating even when some nodes are dishonest or operate inefficiently. Modifying existing records typically requires substantial computing power and electricity. In addition to cryptocurrencies, blockchain can also be used in areas such as healthcare, insurance, supply chains, and the Internet of Things.
Original Tutorial
https://www.binance.com/zh-CN/academy/glossary/blockchain
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