This book focuses on the fields of security of vehicular ad hoc networks (VANETs). Building upon previous research findings, it conducts research on three modules: secure data sensing, computing, and dissemination in VANETs. The book adopts a combination of security analysis, theoretical analysis, and simulation analysis to comprehensively evaluate and demonstrate the effectiveness and performance of proposed solutions. It aims to assist other researchers in conducting studies on the data security issues of vehicular ad hoc networks, while designing secure and efficient schemes.