Rapid digital transformation and increasing cross-border data flows have intensified concerns regarding digital privacy and personal data protection in Southeast Asia. This study aims to analyze the principal legal and institutional challenges hindering the harmonization of digital privacy regulation within ASEAN and to evaluate strategies for strengthening regional digital governance cooperation. Using a normative juridical method with statutory, conceptual, and comparative approaches, this research examines digital governance frameworks in several Southeast Asian countries alongside ASEAN initiatives and international standards such as the General Data Protection Regulation (GDPR). The study finds that ASEAN member states continue to experience significant disparities in legal definitions, enforcement mechanisms, cybersecurity governance, and institutional capacity, resulting in regulatory fragmentation and weak regional interoperability. The findings further demonstrate that ASEAN’s digital governance framework remains predominantly soft-law oriented and institutionally fragmented, limiting the effectiveness of regional harmonization efforts. In addition, emerging technologies such as artificial intelligence, fintech systems, and biometric data processing create new regulatory challenges concerning accountability, digital sovereignty, and consumer protection. The novelty of this research lies in its integrated comparative analysis combining digital privacy, cybersecurity, artificial intelligence governance, and adaptive governance perspectives within a unified Southeast Asian legal framework, which remains underexplored in previous studies. Nevertheless, this study is limited by its doctrinal and desk-based methodology without empirical investigation or stakeholder interviews.
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