A Trust-Centric Privacy-Preserving Blockchain for Dynamic Spectrum Management in IoT Networks
This addresses spectrum efficiency and security for IoT networks, but it is incremental as it builds on existing blockchain and trust-based methods.
The paper tackles dynamic spectrum management in IoT networks by proposing a trust-centric blockchain with a Proof-of-Trust consensus mechanism and privacy protection, resulting in low computation cost for reliable nodes and improved cooperative sensing performance.
In this paper, we propose a trust-centric privacy-preserving blockchain for dynamic spectrum access in IoT networks. To be specific, we propose a trust evaluation mechanism to evaluate the trustworthiness of sensing nodes and design a Proof-of-Trust (PoT) consensus mechanism to build a scalable blockchain with high transaction-per-second (TPS). Moreover, a privacy protection scheme is proposed to protect sensors' real-time geolocatioin information when they upload sensing data to the blockchain. Two smart contracts are designed to make the whole procedure (spectrum sensing, spectrum auction, and spectrum allocation) run automatically. Simulation results demonstrate the expected computation cost of the PoT consensus algorithm for reliable sensing nodes is low, and the cooperative sensing performance is improved with the help of trust value evaluation mechanism.In addition, incentivization and security are also analyzed, which show that our design not only can encourage nodes' participation, but also resist to many kinds of attacks which are frequently encountered in trust-based blockchain systems.