A Review on CSI Based Security Awareness in Wireless Networks

Conventional computer networks are undergoing a paradigm shift with evolving devices capable of performing computational tasks and storing data. The internet of things can be seen as a broader term encompassing conventional networks, with the connection of multiple smart devices connected over internet. Most of the conventional security mechanisms are reactive in nature whereas for large scale networks, a proactive approach is needed to ensure security. Application layer security alone is NOT reliable and enhanced security measures at the network layer and physical layer need to be augmented, which has seen lesser impetus in existing work. Proactive approaches to detect possible attacks use the channel state information (CSI) of the network. However, limited work has been done in estimating the time varying CSI statistics. Outdated CSI can lead to false alarms regarding attacks. Additionally, crest factor reduction of the data stream can make it imperceptible to potential attackers to pick up data transmissions. This would lead to a much more proactive approach for securing new age IoT networks. This paper presents a review on the various proactive approaches for security aware channel assignment for IoT Networks.