Secure Ad-hoc Routing Scheme
It addresses secure communication in ad-hoc networks, but appears incremental as it builds on existing routing and physical layer security methods.
The paper tackles secure routing in multihop wireless networks by proposing a hop-by-hop relay selection based on channel conditions to combat eavesdroppers, deriving theoretical expressions for secrecy capacity and outage probability with asymptotic analysis for diversity gain.
This paper investigates on the problem of combining routing scheme and physical layer security in multihop wireless networks with cooperative diversity. We propose an ad-hoc natured hop-by-hop best secure relay selection in a multihop network with several relays and an eavesdropper at each hop which provides a safe routing scheme to transmit confidential message from transmitter to legitimate receiver. The selection is based on the instantaneous channel conditions of relay and eavesdropper at each hop. A theoretical analysis is performed to derive new closed form expressions for probability of non-zero secrecy capacity along with the exact end to end secrecy outage probability at a normalized secrecy rate. Furthermore, we provide the asymptotic expression to gain insights on the diversity gain.