【摘要】 在FreeBsd系统中,有一种对文件的保护机制,称为Disk PartitionsEncryption(磁盘分区加密),对所有放在被设置为加密分区上的文件,将会被自动加密,用户不会有丝毫察觉,但文件是以加密的方式保存在磁盘上的。当用户在此分区上打开文件时,如果用户的权限满足,文件自动解密后被打开,对用户来说做到完全透明。当磁盘不慎丢失或者被偷窃,此加密分区上的数据也不会泄漏。该文就阐述如何通过一个加密Agent和一个解密Agent,在基于智能卡的基础上在Windows系统上模拟一个如同FreeBsd一样的分区保护系统,用户可以把需要加密的文件拖入到设定的加密分区或者加密文件夹中,文件将被自动加密,用户也可以在此文件夹或者分区中任意打开,阅读以及修改此文件,当保存的时候文件将被自动加密。更多还原

【Abstract】 There is a file protection mechanism called Disk Partitions Encrypti on on FreeBsd system. When one disk partition is set to encrypted state, all fil es p laced on the partition will be automatically encrypted and people are never cons cious of the fact that the files had been encrypted. When one file placed on the partition is opened and the operator has enough privilege to open the file, the file will be automatically decrypted and people are not conscious of it. If th e hard disk are lost or stolen ,the data saved on the encrypted disk partition w ill not let out. The paper mainly describes on Windows System how to realize a p rotected partition or protected file directory through an encrypt agent and a de crypt agent, like the Disk Partitions Encryption on FreeBsd system. The files ca n be easily dragged to the partition or file directory that have been set to enc rypted state and be automatically encrypted .The files on the partition or file directory can be freely opened , read or modified . Once the files are saved to disk ,they will be automatically decrypted .更多还原