Exploiting Blockchain and Secure Access Control Scheme to Enhance Privacy-Preserving of IoT Publish-Subscribe System

Abstract

With the dramatically increasing deployment of intelligent devices, the Internet of Things (IoT) has attracted more attention and developed rapidly. It effectively collects and shares data from the surrounding environment to achieve better IoT services. For data sharing, the publish-subscribe (PS) paradigm provides a loosely-coupled and scalable communication model. However, due to the loosely-coupled nature, it is vulnerable to many attacks, resulting in some security threats to the IoT system, but it cannot provide the basic security mechanisms such as authentication and confidentiality to ensure the data security. Thus, in order to protect the system security and users’ privacy, this paper presents a secure blockchain based privacy-preserving access control scheme for PS system, which adopt the fully homomorphic encryption (FHE) to ensure the confidentiality of the publishing events, and leverage the ledger to store the large volume of data events and access cross-domain information. Finally, we analyze the correctness and security of our scheme, moreover, we deploy our proposed prototype system on two computers, and evaluate its performance. The experimental results show that our PS system can efficiently achieve the equilibrium between the system cost and the security requirement.

Ether-IoT: A Realtime Lightweight and Scalable Blockchain-Enabled Cache Algorithm for IoT Access Control

“…It has been shown that the framework may be used to offer distributed trustworthy access control in the IoT and that it can survive attacks on the network from immoral behavior. According to the authors of [14], the typical centralized publish-subscribe system's security and privacy issues may be addressed with an access control mechanism based on BC and a fully homomorphic encryption algorithm. Experimental evidence supports the theoretical analysis and shows that the plan is technically feasible and efficacious in certain respects.…”