基于无损压缩算法的文件加密标记的实现

Implementation of file encryption tag based on lossless compression algorithm

阐述了当前企业信息化过程中面临的难题,对文件系统驱动设计原理以及当前在Windows内核模式下采用文件系统透明加解密技术实现的加密系统的实现原理和开发步骤进行分析,针对当前这些文件透明加解密系统中难以识别文件是否已经加密的问题,提出了一种采用无损压缩算法生成文件加密标记的算法,并介绍了加密标记的判断、生成时机和复原,最终实现对加密文件标记的设置.该算法的提出使得文件透明加解密系统的研发更加高效,为文件系统驱动的研发拓展了思路.

The current challenges in the information process which the enterprises are facing to is introduced in this paper firstly. Then the driving design principle of file system, the principle and implementation of encryption system based on the file transparent encryption and decryption technology under Windows kernel mode are analyzed. It is difficult to identify whether the file has been encrypted or not under the current file encryption and decryption system. In this paper, a new algorithm, using lossless compression algorithm to generate a kind of file encryption tag, is presented. The judging for encrypted tag, generating time and recovering time are introduced. Finally, the setting of encryption file tag is implemented. This algorithm enables transparent file encryption system to be developed more efficiently and it expand the idea of R ＆ D in file system driver.