The emergence of Smart Cities, facilitated by advancements in technology, heralds a new era of urban development characterized by interconnectedness, efficiency, and sustainability. The integration of many cutting-edge technologies, such as blockchain, Internet of Things (IoT), and artificial intelligence (AI), is essential to achieving the potential of Smart Cities. These technological advancements allow Smart Cities to better manage their resources, provide better public services, and raise the standard of living for its citizens. Nonetheless, the swift expansion of interconnected systems presents intricate obstacles in the domains of cybersecurity and privacy preservation. To solve these issues, practitioners and researchers are actively investigating blockchain solutions, AI-driven security measures, and cryptography techniques. Furthermore, AI is used in Smart Cities not just for security but also for predictive analytics, self-governing systems, and intelligent infrastructure supervision. Though these technologies hold great potential, worries about algorithmic bias, data privacy, and the moral implications of using AI in cities still exist. As Smart Cities continue to evolve, interdisciplinary collaboration and innovative solutions are essential to harness the full potential of technology while safeguarding the rights and well-being of citizens.