Proposing a Blockchain-based Trust Mechanism for Content Caching in Edge Computing
Motahare Ebrahimi, Seyedakbar Mostafavi, Elham Meybodian · 2023
Given the rising network traffic in mobile networks, content caching at edge servers is employed to reduce latency. However, content caching at edge servers faces several challenges. Some edge servers might be malicious and tamper with cached content. Furthermore, edge servers typically have limited capacity. Helper mobile nodes with caching capabilities can assist in addressing these challenges. Due to the selfish nature of mobile nodes, an incentivization mechanism is required to encourage them to share their caching capacity. Additionally, these helper mobile nodes could be malicious. In addressing these challenges, this article proposes a blockchain-based trust computation mechanism in which edge servers and helper mobile nodes with the highest direct and indirect reputation are selected, and by calculating these two reputations, the malicious nodes are removed. Moreover, a blockchain-based authentication scheme of authenticating for mobile nodes is presented. The proposed approach optimizes trustworthiness, price computation, and edge server caching capacity.