{'fraction_non_alphanumeric': 0.01775147928994083, 'fraction_numerical': 0.001183431952662722, 'mean_word_length': 4.916083916083916, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A Decentralized Marketplace for M2M Economy for Smart Cities

Data Marketplace will be the engine of economic progress in smart cities. To foster the new Business Models of the Data and the Machine-to-Machine Economy, there are two needs: managing the plethora of sources of data and link them by a trusted, decentralized and scalable infrastructure. The two disruptive technologies able to foster this innovation are the Internet of Things (IoT) on the data-sources side and the Blockchain on the data marketplace side. In this paper we present a distributed data marketplace allowing different actors to purchase and monitor data streams coming from the smart city thanks to the use of IOTA technology, a Blockchain specifically developed for IoT networks. The marketplace is public and can be the starting point of other IOTA-based solutions.