（）isadecentralized,distrib（2018年上半年信息系统项目管理师上午综合知识真题解析）
（）is a decentralized, distributed and public digital ledger that is used to record transactions across many computers so that the record cannot be alterred retroactively without the alteration of all subsequent blocks and the collusion of the network.
A、Cloud service
B、Blockchain
C、Internet of things
D、Artificial intellingence
参考答案： B
参考解析：正在整理中,欢迎在文下评论区提供答案解析,谢谢！