In this book, the world's foremost cyber security experts share critical practical knowledge on how the cyberspace ecosystem is structured, how it functions, and what we can do to protect it and ourselves from attack and exploitation. It collects the wisdom of cyber security professionals and practitioners from government, academia, and industry across national and international boundaries. It provides readers with the information they need to secure and sustain the cyberspace ecosystem and to defend themselves against all kinds of adversaries and attacks. It provides critical intelligence on cyber crime and security—including details of real-life operations. Among the many important topics it covers are: building a secure cyberspace ecosystem; public-private partnerships to secure cyberspace; law enforcement to protect cyber citizens and to safeguard cyber infrastructure; and strategy and policy issues relating to the security of the cyberecosystem.