Group Secret Key Generation Using Physical Layer Security for UAV Swarm Communications

In unmanned aerial vehicle (UAV) swarm networks, a group secret key (GSK) is required to enable secured UAV-UAV communications, multicast, and broadcast transmission. Moreover, it can be used for device authentication. Therefore, this paper proposes an efficient GSK protocol denoted as the sequential (SSGK) algorithm distributed UAV swarmsecured communications. The proposed utilizes network coding generate cooperation information that transmitted on channel uncorrelated with generated key. depends pairwise generation (PKG) process between pairs of UAVs. However, not all possible agreements are performed minimize time signaling overhead, i.e., agreement only selected UAVs compromise overhead transmission resources achieved redundancy level. obtained results show level 4 sufficient provide reliable process. also performance highly channelbit error rate (BER), number UAVs, length.