A Social Relationship Enabled Cooperative Jamming Scheme for Wireless Communications

With the massive growth of mobile devices and data traffic, it is important to ensure wireless security. Physical layer security utilizing properties of wireless transmission is regarded as a common and promising technology. As a typical physical layer security technology, cooperative jamming is usually affected by social relationships between devices. Devices with excellent social relationships are willing to provide friendly cooperative jamming. Some researchers start to study cooperative jamming using social relationship. In the paper, we propose a social relationship enabled cooperative jamming scheme to achieve secure communications by combining both physical and social information. In particular, we utilize a novel approach to quantify the social relationship metric according to physical locations and effective contact duration between devices. Then, density of legitimate devices as cooperative jammers can be obtained through social relationships. In our scheme, we theoretically analyze the connection outage probability and the secrecy outage probability. Finally, comprehensive numerical results are presented to validate both connection and secrecy performance of cooperative jamming with social relationship.