人类对于重要信息的保护需求可追溯到几百甚至千年前,我们熟知的历史故事里面就有很多,比如三国演义里面的玉带诏书,或者二战中的密码等。互联网诞生后,信息安全也随之成为网络技术的重要内容。早期人们关注数据安全的角度主要是机密性—即保证信息不被非法窃听或窃听 Human needs for protection of important information can be traced back to hundreds or even thousands of years ago. There are many historical stories that we are familiar with, such as the jade tape edict in the Romance of the Three Kingdoms or the password in World War II. After the birth of the Internet, information security has also become an important part of network technology. Early people concerned about data security is the main point of confidentiality - that is, to ensure that information is not illegal eavesdropping or eavesdropping