Many deepfakes are designed to spread disinformation or cause confusion and mistrust, and therefore are a threat to UN Sustainable Development Goal 16: Peace, justice and strong institutions. How do we combat deepfakes, and can technology help us in any way to address this global challenge? Annelise Riles talks about this topic with V.S. Subrahmanian, one of the world's leading experts on the role of AI in national and global security.