Book excerpt: "IoT refers to the interconnection of smart devices and collect data and make intelligent decisions. It is embedded in everyday objects, enabling them to send and receive data. A lack of intrinsic security measures makes IoT vulnerable to privacy and security threats. Blockchain, an encrypted, distributed computer filing system designed to allow the creation of tamper-proof records. The merger of Internet of Things (IoT) and blockchain technology is a step towards creating a verifiable, secure and permanent method of recording data processed by "smart" machines. This book explores the platforms and applications of blockchain-enabled IoT"--