Signal Alignment for Secure Underwater Coordinated Multipoint Transmissions

Underwater acoustic networked systems often consist of geographically distributed antenna elements (DAEs) that are connected via cables or high-rate radio links (e.g., bottom-anchored nodes or surface buoys). This paper investigates countermeasures against eavesdropping attack in the coordinated multipoint (CoMP) transmission of DAEs to an underwater legitimate user. Exploiting the low sound speed in water and the spatial diversity of DAEs, we...