Titan FTP Server can use Secure File Transfer Protocol (SFTP), a Host Key authentication method which adds Secure Shell (SSH) protection to your data transfers. This is Public Key Infrastructure (PKI), which is the use of a key pair made up of a public and private key to encrypt data. The public key can be disseminated by the key pair owner, and any recipient can use it to encrypt data. That data can then only be decrypted by the matching private key the owner keeps secret.