维基百科上对“区块链”词条的描述定义（中英）
文库划重点：是指一串累积不断的记录，一列记录可以捆绑成为区块，由密码学方法相连并加密，故命名。区块链技术可以实现去中心化共识，因而适用于事件记录、医疗记录等记录存储管理工作，如身份档案、交易流程、出处证明、食物追溯、投票表决等。
维基百科“区块链”词条英文原文：
A blockchain, originally block chain, is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Each block typically contains a cryptographic hash of the previous block, a timestamp and transaction data. By design, a blockchain is inherently resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way".For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority.
Blockchains are secure by design and exemplify a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been achieved with a blockchain. This makes blockchains potentially suitable for the recording of events, medical records, and other records managementactivities, such as identity management, transaction processing, documenting provenance, food traceability or voting.
曾鸣书院Nick中文翻译：
所谓区块链，是指一串累积不断的记录，一列记录可以捆绑成为区块，由密码学方法相连并加密，故命名。每一个区块中通常内嵌前一个区块的散列码（密码学术语，根据任何信息生成独一无二的标准化编号）、时间戳、交割数据等信息。
区块链的设计天生不容数据篡改，作为“一种公开、分布式账本，可以有效记录双方的交易行为，此记录可以核实并永存”。区块链作为分布式账本通常由P2P网络共同管理维护，网络中的每个机器都接受该链的密码学协议，并且以此审核新区块。一经记录，任何区块中的数据不可事后更改，若作变更，也必须同时订正链中所有前置区块，这一动作也需要网络中多数参与方认同并且接受订正结果。
区块链的密码学设计提供安全保障，是高容错的分布式计算系统。区块链技术可以实现去中心化共识，因而适用于事件记录、医疗记录等记录存储管理工作，如身份档案、交易流程、出处证明、食物追溯、投票表决等。
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