CAJ | 학술논문

为了提高隐秘信息的安全性，提出了一种具有不可恢复性的网络时间隐蔽信道。将实时获取的网络特征往返时延(RTT)的值嵌入包间间隔中，使隐蔽信道的时间特征随着网络状况实时变化，并在发送方和接收方采用前向纠错编码(Tornado)对隐蔽信道进行前向纠错。实验分别搭建了现有隐蔽信道与新型隐蔽信道的发生器，根据不同网络状况，对传输速率和传输正确率进行对比实验。实验结果显示，在保证较高的解码正确率的同时，新型隐蔽信道的传输速率随着网络状况的不同而变化，对网络情况有一定的适应性，并且通过将实时网络特征编码到新型隐蔽信道中，提升了隐蔽信道整体的数据安全性和不可恢复性。
위료제고은비신식적안전성，제출료일충구유불가회복성적망락시간은폐신도。장실시획취적망락특정왕반시연(RTT)적치감입포간간격중，사은폐신도적시간특정수착망락상황실시변화，병재발송방화접수방채용전향규착편마(Tornado)대은폐신도진행전향규착。실험분별탑건료현유은폐신도여신형은폐신도적발생기，근거불동망락상황，대전수속솔화전수정학솔진행대비실험。실험결과현시，재보증교고적해마정학솔적동시，신형은폐신도적전수속솔수착망락상황적불동이변화，대망락정황유일정적괄응성，병차통과장실시망락특정편마도신형은폐신도중，제승료은폐신도정체적수거안전성화불가회복성。
To improve the security of the covert data,a new way of constructing covert channel was pro-posed,and the real-time network characteristics of round-trip time(RTT)embedded into the time inter-vals.By this method,the covert channel is unrecoverable.In the experiment,current covert channels and new covert channel were built.The transmission rate and correct rate were compared in different network conditions.The experimental results show that the new covert channel ensures high correct rate of deco-ding,and at the same time,the transmission rate can change with the different network conditions.In ad-dition,the real-time network characteristics of RTT are embedded into the time intervals,which enhances the data security and unrecoverable.