This discussion paper by the Cyber Security Agency of Singapore and Resaro explores the intricacies of AI security and its relation to current international conversations about the safety and trustworthiness of AI. The paper also examines how AI security differs from traditional IT security, and the unique risks and vulnerabilities that arise from inherently adaptive nature of AI. The paper then explores how these risks can be addressed through a collaborative, multi-stakeholder effort at both the organisational and ecosystem levels, as well as discuss the roles that various players in the AI ecosystem should undertake to ensure secure AI adoption.