Cctt, \"Covert Channel Tunneling Tool\" - 顾名思义，这是一种隐藏通道工具。他提供几种可行方法来实现允许在已被网络访问控制系统授权的数据流上创建并建立任意数据流传输信道。-Cctt, "Covert Channel Tunneling Tool" - the name implies, this is a hidden channel tools. He provided several possible ways to achieve has been allowed in the network access control system authorized by the data flow on the creation and establishment of arbitrary data stream transmission channels.