Implementasi Asas Legalitas dalam Penegakan Hukum terhadap Tindak Pidana Radikalisme Digital yang Berimplikasi pada Terorisme

The rapid growth of information and communication technology has transformed society while creating new legal challenges, particularly in the spread of radical ideologies through digital platforms. This article examines the implementation of the principle of legality in law enforcement against digital radicalism with implications for terrorism in Indonesia. Using a normative legal research method with statutory, conceptual, and analytical approaches, the study focuses on the Criminal Code (KUHP), the Electronic Information and Transactions Law, and the Terrorism Law. The findings reveal regulatory gaps, unclear legal provisions, and difficulties in distinguishing between protected expression and radical content, which hinder effective law enforcement. These gaps allow perpetrators to exploit digital spaces and evade legal accountability. The study concludes that comprehensive legal reform, progressive legal approaches, and stronger international cooperation are needed to ensure that criminal law remains adaptive to technological developments while upholding legal certainty and human rights.