Blockchain: A Distributed Database Technology

Blockchain is a distributed database technology initially designed for Bitcoin, a cryptocurrency. It is made up of a series of "blocks," which form a chain-like structure, with each block containing a set of transaction records. Blockchain ensures secure, transparent, and immutable data storage and transmission through decentralization, consensus mechanisms, and encryption technology.
Here are some key features and concepts of blockchain:
Decentralization: Blockchain does not rely on a centralized management institution. Instead, it is maintained and validated by multiple nodes in the network. This eliminates the risk of a single point of failure, making the system more stable and secure.
Block: A block is a collection of data containing transaction information for a specific time frame. Each block has a unique identifier (hash value), which is derived from the hash of the previous block's identifier and the data of the current block.