Secure Client Server Network in FTP

The File Transferring Protocol (FTP) has already been widely used for many years. However, there exist some secure vulnerability in the protocol. For example, both passwords and files are transmitted in plaintext. Although some new FTPs such as FTPS (File Transfer Protocol Services) have been proposed and applied to overcome these vulnerabilities, there are many drawbacks such as lack of flexibility in use, failing to meet specific security requirements. Given these facts, the FTP and its requirements are studied deeply and a new ‘SCSN’ (Secure Client Server Network) system. A new SCSN system is proposed based on combination of dynamic password, face recognition, thumb recognition technology as well as the hash function and symmetric key algorithms and etc. to achieve its high security and efficiency. The security level selection mechanism is adopted to meet individual security requirements. The resource access control mechanism is used to keep the server from unauthorized access attacks. Analysis shows that compared with existing FTP systems, the new system makes not only data transmission securer but also system in use easier, more flexible and efficient.