The method used to transfer files over the internet securely is called Secure File Transfer Protocol (SFTP) or HTTPS for web-based file transfers. These protocols encrypt data during transmission, ensuring confidentiality and preventing unauthorized access. SFTP, an extension of the SSH protocol, allows secure file access, transfer, and management over a secure connection. In contrast, HTTPS secures web communications by using SSL/TLS certificates, ensuring the integrity and security of data exchanged between a user's browser and a web server. Both methods protect sensitive information from potential threats.