Trust Evaluation and Covert Communication-Based Secure Content Delivery for D2D Networks: A Hierarchical Matching Approach

Abstract

In this paper, we investigate the secure content delivery issue for device-to-device networks based on the trust evaluation mechanism and covert communication model. Specifically, in order to stimulate the lasting and rational cooperation among mobile devices, we propose a trust evaluation mechanism, where the trust degree between two mobile devices can be obtained through historical assessed values. Simultaneously, a covert communication model is introduced to guarantee the undetectability of content delivery, which helps to stop malicious wardens adopting some coming external attacks. In this way, the availability and dependability of content sharing, as well the confidentiality and integrity of transmitted contents cam be guaranteed. Then, combining security-aware metrics, in terms of trust degree and covert rate, with physical layer transmission performances, in terms of achievable rate and successful delivery probability, we propose the definition of secrecy-aware effective rate to serve as a guidance on the joint optimization issue of content delivery mode selection and resource management, which is formulated as a social welfare maximization problem. To solve the complex problem tactfully, it is decoupled into two subproblems, i.e., mode selection which is a many-to-one matching problem, and resource management which is a one-to-one matching problem. By analyzing the interaction between two issues, a novel hierarchical stable matching algorithm is proposed to obtain three-dimension stable matching results. Its properties, such as stability, convergence, optimality, and complexity, are theoretically analyzed and proved. Finally, extensive numerical results are provided to demonstrate the advantages of our proposed algorithms.

Covertness and Secrecy Study in Untrusted Relay-Assisted D2D Networks

“…The work in [20] proposes a power control scheme to guarantee the covert communications of a D2D pair, and evaluates the covert rate performance. In [21], the joint design of spectrum allocation and power control is proposed for maximizing the covert rate of a D2D pair, while the work in [22] investigates the user trust degree evaluation and spectrum allocation for achieving covert rate maximization. The authors in [23] propose two artificial noise injection schemes to confuse the detection of wardens and the maximum covert rate is further explored under each scheme.…”

Covert Rate Study for Full-Duplex D2D Communications Underlaid Cellular Networks

“…The work in [13] unitized the spectrum reusing technology to implement covert communications for D2D content sharing, based on the trust evaluation mechanism. The authors in [14] further investigated the content delivery mode selection and resource management for covert communications.…”

Matching Theory Based Physical Layer Secure Transmission Strategy for Cognitive Radio Networks

“…To address the above-mentioned issues, matching theory based distributed scheme for the CRN with multiple heterogeneous users is advantageous. Some distributed and flexible methods based on matching theory are proposed to address the joint optimization issues of jammer selection and resource allocation for physical layer security [17]- [20].They prove that by utilizing matching theory, network users can make independent and rational strategic decisions, high-efficiency and low-complexity algorithms can be developed to model collaboration among many users. However, to the best of our knowledge, there is no literature on distributed matching mechanism to address the secure communication issue in CRNs with multiple nonaltruistic PUs, SUs, and eavesdroppers.…”