In the era of the Digital Renaissance, governments face a significant challenge in promoting and raising awareness of the importance of technological innovation. At the same time, they must implement strategies to ensure data privacy protection in these processes. The rapid advancement of Artificial Intelligence, Big Data, Blockchain, and digital governance strategies has increased the need for implementing centralized methodologies and frameworks that balance privacy management and innovation in public administration in response to growing concerns about information security, citizen trust, and regulatory compliance. This research paper analyzes the Privacy-by-Design (PbD) approach as a foundational principle for balancing these priorities, providing greater assurance for a sustainable and citizen-centered digital transformation. This research analyzes global case studies to identify key success factors and challenges in implementing PbD within smart governance initiatives. Additionally, the study demonstrates how governments adopting a PbD-focused methodology can increase citizen trust, improve regulatory compliance, and optimize the ethical management of data, thus promoting a more transparent and innovative public sector for all citizens. This paper also examines the context of adaptive regulation and participatory governance in integrating privacy protections within digital transformation. While PbD provides a solid foundation for sustainable digital innovation, its successful implementation remains a significant challenge. It requires the approach of multiple interested and committed stakeholders, proper technological management, handling of legal frameworks, and public participation. Finally, strategic recommendations are proposed for policymakers on designing governance models that prioritize privacy, innovation, and sustainability in the digital landscape.