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Smart Contract-Based Review System for an IoT Data Marketplace

Interdisciplinary Program of Information Security, Graduate School, Pukyong National University, Busan 48513, Korea
Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
Department of IT Convergence and Application Engineering, Pukyong National University, Busan 48513, Korea
Author to whom correspondence should be addressed.
Sensors 2018, 18(10), 3577;
Received: 31 August 2018 / Revised: 10 October 2018 / Accepted: 16 October 2018 / Published: 22 October 2018
PDF [1692 KB, uploaded 22 October 2018]


Internet of Things (IoT)-based devices, especially those used for home automation, consist of their own sensors and generate many logs during a process. Enterprises producing IoT devices convert these log data into more useful data through secondary processing; thus, they require data from the device users. Recently, a platform for data sharing has been developed because the demand for IoT data increases. Several IoT data marketplaces are based on peer-to-peer (P2P) networks, and in this type of marketplace, it is difficult for an enterprise to trust a data owner or the data they want to trade. Therefore, in this study, we propose a review system that can confirm the reputation of a data owner or the data traded in the P2P data marketplace. The traditional server-client review systems have many drawbacks, such as security vulnerability or server administrator’s malicious behavior. However, the review system developed in this study is based on Ethereum smart contracts; thus, this system is running on the P2P network and is more flexible for the network problem. Moreover, the integrity and immutability of the registered reviews are assured because of the blockchain public ledger. In addition, a certain amount of gas is essential for all functions to be processed by Ethereum transactions. Accordingly, we tested and analyzed the performance of our proposed model in terms of gas required. View Full-Text
Keywords: IoT; data marketplace; blockchain; Ethereum smart contract; smart home; home automation; data integrity IoT; data marketplace; blockchain; Ethereum smart contract; smart home; home automation; data integrity

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Park, J.-S.; Youn, T.-Y.; Kim, H.-B.; Rhee, K.-H.; Shin, S.-U. Smart Contract-Based Review System for an IoT Data Marketplace. Sensors 2018, 18, 3577.

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