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EaseFilter Comprehensive File Security SDK is a set of file system filter driver software development kits which include file monitor filter driver, file access control filter driver, transparent file encryption filter driver, process filter driver and registry filter driver. EaseFilter File Control Filter Driver allows you to control the file I/O operations with the filter rule configuration by setting the whitelist and blacklist processes or users, you can allow or block the specific file I/O operation to the specific process or user, you can control who can read your file, allow or block the file modification, prevent your important file from being deleted, renamed. EaseFilter Encryption Filter Driver(EEFD) allows you to encrypt file automatically and transparently, combine with the File Control Filter Driver and Process Filter Driver, you can implement the Zero Trust File Access Control with encryption enabled, it can enhance the file security. By default all files will be encrypted automatically, all processes or users can't read the encrypted files, they will get the raw encrypted data. You can authorize the processes or users to access these encrypted files. To implement the Zero Trust file access control , you can setup the filter rule with the default least privilege access rights, by default all the processes or users don’t have privilege to access the files inside this filter rule, it is zero trust to all processes and users. You can setup the whitelist for the filter rule, to add the specific access rights to specific processes or users, so the processes or users who are in the whitelist can have the specific access rights to the files.