In this presentation, Dr. Xinxin Fan will first explain how to use blockchain to enhance security of IoT devices across their entire lifecycle, followed by an introduction of the ongoing standardization effort undertaken by the IEEE P2958 Identity of Things Working Group (https://sagroups.ieee.org/2958/). Finally, Dr. Fan will describe the application of blockchain-based security techniques for protecting real-world home IP camera systems. This presentation aims to bring new perspectives to many security challenges facing by IoT systems today.