期刊名称：International Journal of Computer Science Issues
印刷版ISSN：1694-0784
电子版ISSN：1694-0814
出版年度：2011
卷号：8
期号：6
出版社：IJCSI Press
摘要：Covert Channel are the methods to conceal a message in the volatile medium carrier such as radio signal and network packets. Until now, covert channels based on the packet length produce abnormal packet length when the length of the message is long. Abnormal packet length, especially in the normal network will expose the covert channels to network security perimeter. Therefore, it motivates the study to propose a new method based on reference matrix to hide the secret message in DNS request. Normal DNS request packet was collected from the campus network. The proposed packets length covert channel was compared with normal DNS request packets. The study found that the new purpose covert channels produce normal DNS packet length according to the campus network.
