The world is undergoing a major shift with the rise of blockchain technology - a decentralized database of records known as blocks. This innovative development has only been around for 12 years, but its potential impact is massive. The book, "One World - One Identity" by Rishabh Garg, provides a comprehensive overview of the blockchain ecosystem, including its potential uses in fields such as cryptography, medicine, finance, and e-commerce. The content includes step-by-step instructions for readers to create their own blockchain system.This book will empower you to harness the power of blockchain and develop decentralized applications, setting you ahead of the curve. The book covers various aspects of blockchain technology and its tamper-proof ecosystem, exploring its use in education, employment, healthcare, banking, real-estate, e-commerce, and more. With a clear and engaging narrative, accompanied by illustrations, this book is an excellent resource for scholars and entrepreneurs alike.