新一代的文件过滤系统，文件的微过滤，不过这只是个简单的示例，不允许用户使用文件名位notepad.exe的文件-A new generation of document filtering system, micro-filter paper, but this is just a simple example, does not allow users to file documents fame notepad.exe

简单的文件系统过滤驱动加密txt文件，可以用作学习和测试-Simple file system filter driver encryption txt file, can be used as a good example for learning