File transfer protocol secure (FTPS) is an extension of the standard File Transfer Protocol (FTP) that adds support for encryption through Secure Sockets Layer (SSL) or Transport Layer Security (TLS). This ensures that data transferred between the client and server is encrypted, providing a higher level of security than regular FTP. FTPS allows for secure authentication and data transfer, protecting sensitive information from being intercepted or tampered with during transmission. By combining the familiar functionality of FTP with robust encryption protocols, FTPS offers a secure method for transferring files over the internet.