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EaseFilter File System Encryption Filter Driver SDK provides you a comprehensive security solution to develop transparent file level encryption products, it allows you to encrypt the files on-the-fly, it can allow only authorized users or processes to access the encrypted files. Supported strong cryptographic algorithm Rijndael is a high security algorithm which was chosen by the National Institute of Standards and Technology (NIST) as the new Advanced Encryption Standard (AES), it can support key lengths 128-bits,192-bits and 256-bits. EaseFilter File System Mini Filter Driver SDK is a mature commercial product. It provides a complete modular framework for the developers even without the driver development experience to build the filter driver within a day. The SDK includes the modules from code design to the product installation, it includes all the basic features you need to build a filter driver. The file encryption on the go provides file protection at rest, automatically encrypt your file when it was shared, moved or copied from one system or user to another. File encryption on the go can be applied on a file-by-file basis, or applied to all files within a protected folder to specific processes. Protect your files against the unauthorized access, the data was encrypted when the unauthorized processes read your files from the protected folder. The EaseFilter File Encryption On The Go SDK was implemented with Windows transparent file system filter driver in Windows kernel level. File encryption or decryption is transparent to user or application with transparent file encryption engine. The files in the protected folder are not encrypted in the local disk, the data will be encrypted only when the unauthorized processes read the files from the protected folder, it won't change the files in the local disk, the files always are clear in local disk.