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中文摘要：
针对传统IP时间隐蔽信道传输速率低,在广域网中缺少一种稳定的时间同步机制,难以实现收发双方间可靠、稳定传输隐蔽信息的问题,提出了一种可靠网络隐蔽信道的模型。这种信道利用在固定时间窗口内发送的IP数据包数量作为载体传输隐蔽信息。通过引入一种新的信息编码机制,显著提高了网络隐蔽信道的传输带宽。进一步提出了一种比特块定界方法,解决了传统IP时间隐蔽信道的时间同步问题。实验结果表明,提出的可靠网络隐蔽信道的传输速率和稳定性均好于传统的IP时间隐蔽信道。
英文摘要：
To solve the problem that the transmission rate of the traditional IP covert timing channel was low,lacked a stable time synchronization mechanism in the WAN,and was difficulte to achieve transmit hidden message reliably and stably between sender and receiver,this paper proposed a robust network covert channel（RNCC）.This channel used the number of IP packets sending in a fixed time window to transmit hidden message.To improve the bandwidth of RNCC,analyzed a new information encoding mechanism.Furthermore,proposed a new synchronization method,which was to solve the problem of time synchronization of the traditional IP covert timing channel,and to ensure the reliability of RNCC.The experimental results show that the capacity and robustness of RNCC is better than the traditional IP covert timing channel.
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