Technological Barriers of (non)Blockchain Enabled IoT Data Marketplaces

Today, data is one of the world's most valuable resources that is growing at an exponential rate. Moreover, the world is rapidly becoming more connected with the capability of intelligent devices, which bring extensive opportunities among different domains such as health care, public sector, transportation, education, financial services, etc. While the utilization of big data is a key factor for success in many businesses, smart cities make use of Internet of Things (IoT) devices to generate a huge amount of data, termed as Big Data. Big data refers to the vast untapped value, and it is growing exponentially. To maximize the utility of collected data, a secure and efficient platform is needed to make data sourcing effortless for buyers and maximize data monetization for sellers. Building a global data marketplace can leverage all data exchange opportunities and help businesses share relevant data. However, there are major challenges regarding IoT data marketplaces. This paper presents an overview of the findings in current state-of-the-art focusing on technological barriers of IoT data marketplaces either utilizing blockchain or non-blockchain technology. Finally, we conclude that neither decentralized nor centralized approaches doesn't make sense solely.