Secure Caching Scheme Using Blockchains for Unmanned Aerial Vehicle-Assisted Information-Centric Wireless Sensor Networks

Abstract

This paper proposes a caching data protection scheme that uses blockchains and hashchains for unmanned aerial vehicle (UAV)-assisted information-centric wireless sensor networks in smart-city applications as a case study. In the consensus scheme of the proposed scheme, a new block is verified according to voting by validators without exhaustive mining computations. Therefore, the proposed scheme is suitable for resourcelimited wireless and mobile devices. With the scheme, UAVs work as validators as well as data collectors, and the overhead of transaction-fee management can be eliminated. Validators are responsible for block verifications; thus, the proposed scheme maintains the consensus by detecting and removing validators that vote incorrectly by using hashchain-based signatures. Simulations were conducted to evaluate the proposed scheme, and the results revealed the requirements for implementing it in smart-city applications and its robustness, feasibility, and effectiveness.

Application Areas of Information-Centric Networking: State-of-the-Art and Challenges

“…The proposed scheme improves storage, delay and computational overhead compared to the data authenticity scheme inherently present in NDN architecture. In [83], a blockchain-based approach to mitigate cache pollution attacks in UAV-assisted IC-WSNs is discussed. The scheme uses a blockchain-based caching and hash chain-based signature to mitigate cache pollution attacks.…”