Secure communications in cognitive underlay networks over Nakagami-mchannel

Cognitive Multihop Wireless Sensor Networks over Nakagami-m Fading Channels

Secure Group Communications over Combined Wired and Wireless Networks

Abstract. This paper considers the fundamental problem of key agreement among a group of parties communicating over an insecure public network. Over the years, a number of solutions to this problem have been proposed with varying degrees of complexity. However, there seems to have been no previous systematic look at the growing problem of key agreement over combined wired/wireless networks, con...

Secure Transmission of Underlay Cognitive Radio with Passive Eavesdropping

The security in cognitive radio networks (CRNs) has attracted recently a significant attention due to the open environment of the spectrum sharing networks, which make them more vulnerable to wireless attacks. In this paper, we consider the problem of physical layer security in CRNs. Our objective is to enhance the secrecy performance of the secondary user (SU) in the presence of passive eavesd...

Secure Group Communications over Combined Wired/Wireless Networks

This paper considers the fundamental problem of key agreement among a group of parties communicating over an insecure public network. Over the years, a number of solutions to this problem have been proposed with varying degrees of complexity. However, there seems to have been no previous systematic look at the growing problem of key agreement over combined wired/wireless networks, consisting of...

Secure Communications over Wireless Channels

In this work, we present new techniques that leverage the wireless medium in facilitating secure communications in the presence of eavesdroppers. First, we consider the secure transmission of information over an ergodic fading channel with long coherence intervals. The secrecy capacity of such a system is characterized under different assumptions on the available channel state information. We t...