Elgar Advanced Introductions are stimulating and thoughtful introductions to major fields in the social sciences, business, and law, expertly written by the world's leading scholars. Designed to be accessible yet rigorous, they offer concise and lucid surveys of the substantive and policy issues associated with discrete subject areas. This succinct Advanced Introduction delivers insights into the pressing technological, political, and legal challenges of cybersecurity. Exploring cybersecurity threats on both a national and global scale, it provides guidance on how countries use domestic and international law to counter crime, terrorism, espionage, and armed conflict in cyberspace. Key features:Centres cybersecurity law within the internet as a technology, cyberspace as a political and governance space, and transformations in international relations over the past twenty yearsTracks how the development of policies on responding to different cyber threats, improving cyber defences, and increasing cyber deterrence affects the use and effectiveness of cybersecurity lawAnalyses whether the ongoing evolution of cyber threats changes, or should change, how countries apply domestic and international law to counter cybersecurity challenges concerning crime, terrorism, espionage, and armed conflict This Advanced Introduction is an invaluable resource for researchers and students of law, public policy, and international relations focusing on how digital technologies, the internet, and cyberspace affect world affairs. It also serves as an accessible entry point for government, corporate, and NGO staff concerned with cybersecurity law.