Blockchain Technologies and Crypto-Currencies takes into account the methods and technologies involved in blockchain along with its significant application in the field of finance. It includes the analysis of R & D capability of china's blockchain technology and implementation of blockchain as a breakthrough in the development of artificial intelligence. This book also discusses about Blockchain-Based Access Verification Protocol in LEO Constellation Using IBE Keys, Blockchain Platform for Industrial Internet of Things, Blockchain Based Credibility Verification Method, Research on a New Signature Scheme on Blockchain and IOV Privacy Protection System Based on Double-Layered Chains. It also provides the reader with the insights of crypto-currencies and blockchain technologies in order to analyze the impact of blockchain technologies in the field of finance and its application to the Internet of things (IoT).