This volume gives readers an understanding of the multifaceted threats posed by the evolving cybersecurity landscape in smart environments, while also offering strategic insights into mitigative measures and proactive solutions. The chapters in the first part explain the current state of smart environments, shedding light on their complexities and vulnerabilities. The second part provides a fresh perspective on existing technologies and cyber challenges within the context of the modern era, offering novel insights and analyses. The third part is dedicated to exploring the intricacies of critical infrastructures. The concluding section offers a succinct overview of distributed ledger and privacy enhancement approaches, underscoring their potential role in fortifying cybersecurity measures. The contributors are among the leading researchers in the areas of smart environments, information security, and privacy, and the content will be of value to researchers in academia and industry, and security practitioners and policymakers.