ABSTRACT
Information privacy in wireless networks has been given considerable attention for several years due to the broadcast nature of the wireless medium which allows all users in the coverage area of a transmission to overhear the source message. In order to investigate the effect of jamming, it is necessary to distinguish between the following three cases: no jammer selection, conventional jamming, and controlled jamming. This chapter investigates relay and jammer selection schemes to increase one-way cooperative networks' security in the presence of one or more eavesdroppers. The chapter discusses the effect of presence of one eavesdropper while it studies the effect of presence of more eavesdroppers on cooperative network performance as follows. It introduces the system model and formulates the problem. The hybrid scheme overcomes jamming limitations and seems to be an efficient solution for practical application with critical secrecy constraints. The chapter also discusses the impact of changing both the eavesdroppers and the relays' location on the system performance.
