Blockchain-Based Privacy-Preserving Dynamic Spectrum Sharing

Abstract

For improving the utilization and alleviating the shortage of spectrum resources, centralized database-based dynamic spectrum sharing system has been proposed. However, the centralized architecture is often considered to be nontransparent and more vulnerable to be attacked. To address the above issues, in this work, we propose a blockchain-based dynamic spectrum sharing framework. The distributed architecture based on blockchain technology can bring advantages including decentralization, openness, transparency, immutability and auditability. Considering that the introduction of blockchain technology in spectrum sharing will also bring privacy issues, we design a differential privacy-based privacy-preserving double auction mechanism. The auction can be implemented in smart contracts running on the blockchain. The proposed double auction mechanism is proved to satisfy differential privacy, individual rationality, computational efficiency, and truthfulness. The extensive experiments demonstrate the effectiveness of the proposed dynamic spectrum sharing scheme.