期刊名称：International Journal of Computer Science & Technology
印刷版ISSN：2229-4333
电子版ISSN：0976-8491
出版年度：2012
卷号：3
期号：4
页码：229-233
语种：English
出版社：Ayushmaan Technologies
摘要：The creation of covert channels in public computer networks can prove an effective means of information hiding and secret communication. A network covert channel is a mechanism that can be used to leak information across a network in violation of a security policy and in a manner that can be difficult to detect. These channels are used for the secret transfer of information. Encryption only protects communication from being decoded by unauthorized parties, whereas covert channels aim to hide the very existence of the communication. Hiding a communication channel between any two end points in the internet and their messages therein is an important research problem due to its security and privacy ramifications. The huge amount of data and vast number of different protocols in the internet seems ideal as a high-bandwidth vehicle for covert communication. The non-transparency in covert channel is also referred to as trapdoor. A trapdoor is unintended design within legitimate communication whose motto is to leak information. Subliminal channel, a variant of covert channel works similarly as network covert channel except that trapdoor is set in cryptographic algorithm. In this paper, we present a study of designing different covert channel and introduce design of hybrid covert channel which is a composition of covert channel with subliminal channel.
