Kerberos 是一种网络认证协议，其设计目标是通过密钥系统为客户机 / 服务器应用程序提供强大的认证服务，这个代码实现了其处理过程。

-Kerberos is a network authentication protocol, which is designed to provide strong authentication services for client/server applications by key system, the code achieved its process.