Realizing Open and Decentralized Marketplace for Exchanging Data of Expected IoT Behaviors

As data marketplaces become popular in different domains, this paper proposes creating a special marketplace focused on IoT cybersecurity. The goal is to openly share knowledge about IoT devices’ behavior, using structured data formats like Manufacturer Usage Description (MUD) files. To make this work
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, we employ technologies like blockchain and smart contracts to build a practical and secure foundation for sharing and accessing important information about how IoT devices should behave on the network. Our contributions are two-fold. (1) We develop a smart contract on the Ethereum blockchain with five concrete functions that realize the essential features of an effective marketplace for sharing data related to the expected behaviors of IoT devices. (2) We implement a prototype of our marketplace in a private chain environment—our codes are publicly released. We demonstrate how effectively our marketplace functions through experiments involving MUD files from consumer IoT devices. Our marketplace enables suppliers and consumers to share MUD data on the Ethereum blockchain for under a hundred dollars, promoting accessibility and participation.