Cooperative Secure Transmission by Exploiting Social Ties in Random Networks

TL;DR

This paper introduces a hybrid cooperative beamforming and jamming scheme leveraging social trust degrees to enhance security in wireless networks, providing analytical expressions for outage probabilities and validating the impact of social trust on security performance.

Contribution

It proposes a novel social trust-based cooperative security scheme with analytical performance metrics under stochastic geometry models.

Findings

Social trust degree significantly affects security performance.

Closed-form expressions for connection and secrecy outage probabilities are derived.

The scheme's effectiveness is validated through simulations.

Abstract

Social awareness and social ties are becoming increasingly popular with emerging mobile and handheld devices. Social trust degree describing the strength of the social ties has drawn lots of research interests in many fields in wireless communications, such as resource sharing, cooperative communication and so on. In this paper, we propose a hybrid cooperative beamforming and jamming scheme to secure communication based on the social trust degree under a stochastic geometry framework. The friendly nodes are categorized into relays and jammers according to their locations and social trust degrees with the source node. We aim to analyze the involved connection outage probability (COP) and secrecy outage probability (SOP) of the performance in the networks. To achieve this target, we propose a double Gamma ratio (DGR) approach through Gamma approximation. Based on this, the COP and SOP are tractably obtained in closed-form. We further consider the SOP in the presence of Poisson Point Process (PPP) distributed eavesdroppers and derive an upper bound. The simulation results verify our theoretical findings, and validate that the social trust degree has dramatic influences on the security performance in the networks.