0引言邮政信息网由两大部分组成,即邮政综合计算机网和邮政金融计算机网。邮政综合计算机系统由15个子系统组成,邮政金融计算机系统由9个子系统组成。邮政信息网为邮政企业的经营管理、内部生产、对外服务提供了良好的网络基础。随着邮政企业信息化水平的提高和网络规模的扩大,各应用系统的数据已成为企业最重要的信息资源,数据的丢失或毁坏都有可能给企业带来不可估量的损失。因此,如何保证企业数据完整性和安全性成 0 Introduction Post information network consists of two parts, namely, postal integrated computer network and postal financial computer network. Postal integrated computer system consists of 15 subsystems, postal financial computer system consists of 9 subsystems. Post information network for the postal business management, internal production, external service provides a good network foundation. With the improvement of the level of informatization of the postal enterprises and the expansion of the network scale, the data of each application system has become the most important information resource of an enterprise, and the loss or destruction of data may bring immeasurable losses to the enterprise. Therefore, how to ensure the integrity of enterprise data and security into