Please check my grammar Study Plan Motivation： With the ongoing improvement of network technology, many manpower-relying works have gradually been transferred into Internet, Hence the private information on the Internet have become much more year by year. And the Kerberos protocol is exactly a secure efficient computer-network authentication protocol that allows user communicating over a non-secure network. For example, a dealer want to hold concert in Kenting, and it cost too much arranging Ethernet cable at the scene. However, the Kerberos system can easily authenticate people who bought ticket on Internet before just by Bluetooth or iBeacon. So consumers can use services without worring about that the data transmission over the Network is eavesdropped or that his individual Imformation is disclosed. Purpose： To construct a secure useful ticket-reserving trading system. User just need to log in Website online and reserve tickets, and go to the unmanned store within the time limit, then he can activate services by wireless network. By Kerberos protocol, consumers not only can improve the simplicity of deal and the personal costs for store can also be reduced. Followings are some Kerberos’ features and mechanism： 1. Even though data is stolen, it will be invalid due to the lifetime of TGT(Ticket-Granting-Ticket). 2. Just one login can user use all network services within the time limit. 3. Provide two-factor authentication between user and server－Client can check the identity of server and vice versa. In short, I hope that I will have an opportunity to have an advanced study and my following graduate school can satisfy me with comprehension in the area of network security. My following study will focus on related knowledge of Information Security such as Cryptography, Network, System Security and so on.