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Securing the infrastructure of smart cities presents unique challenges that demand innovative and adaptive cybersecurity strategies. Begin by identifying critical systems—such as energy grids, water management systems, and public transportation networks—and prioritize their protection with layered security measures. Use network segmentation to separate critical infrastructure from publicly accessible systems, ensuring that an attack on one segment does not compromise the entire city. Deploy advanced threat monitoring systems that leverage AI and machine learning to detect and respond to anomalies in real-time. All connected devices, including IoT sensors, should be secured with strong passwords, regular firmware updates, and encryption for data in transit. Establish robust identity and access management (IAM) policies to control who can access critical systems, using multi-factor authentication and role-based permissions. Smart city applications must be designed with secure coding practices to prevent vulnerabilities such as SQL injection and cross-site scripting. Public Wi-Fi networks should be secured with WPA3 encryption and regularly monitored for unauthorized access or malicious activity. Implement disaster recovery plans that include Secure Wi-Fi (edu.yju.ac.kr), offsite backups of critical data, ensuring rapid restoration after a cyber incident. Educate city employees and contractors on the importance of cybersecurity and equip them with tools to recognize phishing attacks and social engineering. Public awareness campaigns are equally important; educate citizens on best practices for engaging with smart city technologies safely. Collaboration between governments, private sector partners, and cybersecurity experts is essential for developing standardized security protocols and sharing threat intelligence. By addressing these complexities, smart cities can innovate safely while maintaining public trust and operational resilience.