Covert communication channels in computers have been a continual area of research and provide a potential avenue through which just-in-time data transfer may occur to bootstrap a secure communication when an existing dedicated secure channel is compromised. The ubiquity of WiFi networks today make covert channels in network communications a particular hot spot of research and can provide many flexible and difficult to detect options. In this paper, we provide a systems implementation and performance evaluation of a RTS/CTS based covert channel dubbed “Opportunistic Secure Communication (OpSeCom)” proposed by Husain et al. which shows the promising application of the proposed channel in real-time communication such as wireless authentication.