1.      Place the file KServer.java in the path where Java path is set in Server system.
2.      Place the files KClient31.java, Des.java, Rsa.java in the path where Java path is
        set in Client systems.
3.      Place all the images with extension .gif used in the KClient31.java program in
        the path where Java path is set in Client systems.
4.      First compile all the files. For example the KServer.java file is compiled as
        javac KServer.java. Similarly compile all the files in their respective systems.
5.      Run KServer.java file in server system using java KServer.
6.      Run KClient31.java file in client system using java KClient31.
7.      Connect to server when server is waiting for client.
8.      Server gives connection if it is already started.
9.      Press encrypt in File menu for encryption process.
10.     Click on the IP address of the logged user to whom u wish to send message.
11.     Press Send in File menu to send encrypted message.
12.     Press decrypt in File menu for decryption process.
13.     The IP addresses in the list specify the clients from whom you received messages.
14.     Press Save in File menu if you want to save the decrypted message to a file.