This encyclopedia serves as a comprehensive guide to the evolving landscape of security management, with a particular focus on contemporary threats and protective measures. The Second Edition significantly expands upon its predecessor by integrating crucial topics such as homeland security, terrorism, and the protection of national infrastructures like transportation, energy, and agriculture. It details risk assessment methodologies, disaster mitigation and remediation strategies, and the specific security protocols required for a wide array of critical sites and systems, including power plants, transit networks, and financial centers.

The Second Edition of the Encyclopedia of Security Management is presented as a vital resource for security professionals, building upon the foundation of the first edition with updated and expanded content. It emphasizes contemporary issues such as homeland security and terrorism, alongside detailed considerations for protecting critical national infrastructures and specific site types. The inclusion of topics like risk assessment and disaster mitigation suggests a practical and forward-looking approach to the field.