基于文件系统过滤驱动的透明加解密技术实现

Transparent Encryption and Decryption Based on File System Filter Driver

分析了基于文件过滤驱动的透明加密技术的实现难点,给出了透明加密前的预处理、读过程的过滤解密操作、写过程的过滤加密操作、清除缓存操作的具体实现技术,以及如何控制缓存管理器对透明加密的影响技术细节.指出了在文件透明加解密实际开发过程中容易出错的几个要点,为应用透明加密技术保护文档安全提供参考.

It analyses in detail the file system filter driver to achieve transparent encryption especifically how to deal with the transparent encryption process,including the encryption in the pre-reading process of decryption and in the writing process,and proper clearance in buffer operation.Besides,it analyses how to control the Cache Manager on the impact of encryption.It points out a number of points in the actual development process which need attention.It is useful for the development of transparent encryption software.