若硬盘上的加密备份文件未被破坏，以该文件快速恢复被破坏的工作文件，并更新标准参照数据。
Renewing work file with it's mirroring in hard disk and renewing its standard data reference rapidly if the encrypted mirroring in hard disk was not demolished.
目前网络通信中通常采用的是分组数据加密算法——DES，它拥有简捷、快速和标准化的特点，软硬件技术的实现也已经非常成熟。
The software and hardware technology of DES is also very mature, but there are some weaknesses of DES in security and etc.
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