Authors:
H. Baniata
and
A. Kertesz
Affiliation:
University of Szeged, H-6720 Szeged, Dugonics ter 13, Hungary
Keyword(s):
Privacy, Fog Computing, Blockchain, IoT, Validation, Trust.
Abstract:
Blockchain technology has been successfully implemented in cryptocurrency industries, yet it is in the research phase for other applications. Enhanced security, decentralization and reliability are some of the advantages of blockchain technology that represent beneficial integration possibilities for computing and storage infrastructures. Fog computing is one of the recently emerged paradigms that needs to be improved to serve Internet of Things (IoT) environments of the future. In this paper we propose PF-BVM, a Privacy-aware Fog-enhanced Blockchain Validation Mechanism, that aims to support the integration of IoT, Fog Computing, and the blockchain technology. In this model the more trusted a fog node is, the higher the authority granted to validate a block on behalf of the blockchain nodes. To guarantee the privacy-awareness in PF-BVM, we use a blockchain-based PKI architecture that is able to provide higher anonymity levels, while maintaining the decentralization property of a blo
ckchain system. We also propose a concept for measuring reliability levels of blockchain systems. We validated our proposed approach in terms of execution time and energy consumption in a simulated environment. We compared PF-BVM to the currently used validation mechanism in the Proof-of-Work (PoW) consensus algorithm, and found that PF-BVM can effectively reduce the total validation time and total energy consumption of an IoT-Fog-Blockchain system.
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