Download now Free registration required
This paper presents a novel method to implement a covert channel that is based on inducing dynamics to convey a covert message. These dynamics are induced in a manner that emulates the normal operation of a hypothetical virtual channel. As a case study, this paper focuses on a scenario whereby TCP packet losses are induced to change the behavior of the Additive-Increase Multiplicative-Decrease (AIMD) congestion control mechanism of TCP to convey the covert message. From the outside, the TCP connection appears to be a normal connection that is traversing a congested link or a lossy wireless link. However, the sender, through monitoring the packets that get retransmitted, will decode the covert message.
- Format: PDF
- Size: 144.7 KB