Dr Gideon Greenspan is the founder and CEO of Coin Sciences Ltd, the company behind MultiChain, the popular platform for private blockchains. MultiChain includes features such as permissions management, native assets, data streams and simple configuration and deployment, and has been used successfully for blockchain projects in many of the world's largest banks, consulting firms, financial technology and IT companies. Gideon is also a well-known writer on private blockchains, with a reputation for going beyond the hype to focus on genuine and practical applications of this technology. He has written extensively on the trade-offs between blockchains and regular centralized databases, the challenges of implementing smart contracts, and the criteria one should assess in determining whether to use a blockchain at all. Prior to founding Coin Sciences, Gideon conceived and built many profitable web services with a deep algorithmic element, including Copyscape, the leading plagiarism search engine, and Web Sudoku, the web's most popular sudoku site. Gideon has a BA and PhD in Computer Science (Cambridge and Technion) and an MA in Philosophy (London). As a hobby he teaches software entrepreneurship at the IDC.