Lan File Transfer Security Technology And Its System Design

At present, the LAN (local area net) has been rapid, well developed. The LAN has been used in all aspects of life and work. Electronic security has become a hot point in security areas. A malicious disclosure of confidential corporate event will suffer huge losses, often give companies incalculable consequences.In this article,1 do mainly research of share business of LAN. Because of insecurity of the existing LAN environment. I consider ways to transfer files with encryption. In this system,I study and use three encryption ways to encrypt files such as DES,3DES, AES. Than I transfers file through a new way based on UDP.In this system, I use the UIs of MFC8.0 to draw the UI in this system. The key algorithms use standard C++ language and with little modification it is suit for this system. This system is designed with peer-to-peer mode which can be used in all scopes of LAN. Every client is independent, and it means that a client's shut does not make any effect in others. Because of this, it can guarantee the execution of the system effectively.In this paper:1. Design the cryptographic algorithm with some others mixture. In this way the security of system can be advanced; 2. UI design of the user, the new design concept allows users to greatly simplify operation; 3. Protocol design, design a high UDP-based File Transfer Protocol.Ultimately the whole system is achieved, and efficiency is analyzed. The final test shows that the system compared to existing systems, the efficiency has been greatly improved.