This software is a file system I/O activity monitor and controller. It allows for the control of file system I/O permissions and the ability to modify file system calls. The software includes a transparent file system filter driver that enables on-the-fly encryption and decryption of files.

One popular use for this driver is in file system monitoring. By using a file system monitor filter, you can keep an eye on various file system activities in real-time. This includes capturing information like file open/create/replace, read/write, query/set file attribute/size/time security information, rename/delete, directory browsing, and file close requests. With this level of visibility, you can develop software for continuous data protection (CDP), auditing, and access logs.
Another useful type of file system filter driver is the control filter. With this driver, you have full control over file activities like open/create/replace, read/write, query/set file attribute/size/time security information, rename/delete, and directory browsing. You can intercept file system calls and modify their content as needed. Plus, you can create rules that allow, deny, or cancel certain executions based on your filter settings.
The final type of file system filter driver we'll cover is the encryption filter. This driver is designed to provide transparent file-level encryption, meaning that the encryption process happens in the background without any user input necessary. You can use this driver to create your own encryption products that encrypt or decrypt files on-the-fly. Its encryption engine relies on the Rijndael algorithm, which is considered very secure and was chosen as the new Advanced Encryption Standard (AES) by the National Institute of Standards and Technology (NIST).
Overall, file system filter drivers are a powerful tool for developers who want more control over file system activities. Whether you need to monitor, control, or encrypt files, these drivers are up to the task.
Version 5.1.8.1:
1. Added trusted process to control the filter rule.
2. Fixed the slow issue of the service starting.
3. Enhanced the driver connection security check.
4. Fixed the issue which the user access rights not working correctly.