Secure SFTP - FTP Server for Windows Server 2016 is the best solution to transfer files and data securely over encrypted network layers (using SSH2 protocol). SFTP is not just a simple "FTP over SSH" wrapper - it is a newer protocol, supported by all SSH2 servers. With SSH protocol, the secure data transfer across the network is enabled in SFTP Server by default. Strong encryption for identities, passwords, and the data transmitted allows the user to transfer the files safely so that they cannot be attacked and stolen. For secure transmission that protects the username and password, and encrypts the content, FTP is secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol (SFTP).