"Blockchain technology has evolved significantly over the past decade, reshaping the way we think about trust, security, and decentralization. I wrote this book to share the lessons I have learned from my early experiments with blockchain security, dating back to 2015. At the time, I was a Senior Application Security Architect at one of the largest financial institutions in the U.S., where I was responsible for conducting security reviews of blockchain-based projects. These initiatives were undertaken in collaboration with startups developing blockchain technology and banking consortia exploring its potential applications."-- Provided by publisher.