Here is an abstract for an academic project title for computer science and engineering

SFTP is a protocol API. While designing this project, key emphasis has been paid to security rather than any other aspect. SFTP is a UDP-based replacement for the File Transfer Protocol, designed for anonymous and secure access with lower hardware and network requirements than FTP. In particular, because it uses UDP, it avoids the problems that many FTP servers have had with requiring a separate process for each client, and because it is built to use an unreliable protocol, it can more easily handle resuming a transfer after a network failure.

As SFTP server requires only one process (as opposed to one process per client for most FTP servers), it is much harder for a system administrator to notice it in a process list, and as it uses UDP, it is less likely to be noticed by a network administrator.

Technologies: JFC, IO Streams, Sockets, Threads, Cryptography