计算机网络的安全性是指保障网络信息的保密性、完整性、网络服务可用性和可审查性,即要求网络保证其信息系统资源的完整性、准确性和有限的传播范围,并要求网络能向所有的用户有选择地及时提供各自应得到的网络服务。所有的应用系统无论提供何种服务,其基础和核心都是数据。如何利用数据备份来保证数据安全也就成了我们迫切需要研究的一个课题。 Computer network security is to protect the confidentiality, integrity of network information, network service availability and scalability, which requires the network to ensure the integrity of its information system resources, accuracy and limited scope of communication, and requires the network to All users have the selective and timely provision of their respective web services. No matter what kind of service all applications provide, the basic and core are data. How to use data backup to ensure data security has also become an issue we urgently need to study.