Cross-border cybercrimes like online fraud and illegal gambling surge in Indonesia, inflicting IDR 3.2 trillion losses by mid-2025 due to foreign perpetrators exploiting jurisdictional voids in national laws. This narrative review aims to scrutinize regulatory gaps in Indonesia's ITE Law, KUHP, and KUHAP, alongside Budapest Convention prospects for transnational enforcement. Population encompasses 2015-2025 literature from Scopus, official reports, and ASEAN documents; purposive sample selects 25 key sources on cybercrime trends and cooperation. Instruments include systematic search protocols with keywords "cybercrime," "online fraud," "Budapest Convention" via PubMed, Google Scholar; thematic analysis classifies issues per legal frameworks, followed by narrative synthesis. Findings indicate enforcement confined to content blocking amid weak MLA and digital evidence protocols, with high prosecution failures. In conclusion, Budapest ratification and ASEAN MLAT optimization enable harmonized jurisdiction, evidence sharing, and extradition to bolster cyber defenses.
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