Extremist groups have begun to experiment with artificial intelligence, and in particular generative AI, in order to create a flood of new propaganda. Experts now fear the growing use of generative AI tools by these groups will overturn the work Big Tech has done in recent years to keep their content off the internet. "Our biggest concern is that if terrorists start using gen AI to manipulate imagery at scale, this could well destroy hash-sharing as a solution," Adam Hadley, the executive director of Tech Against Terrorism, tells WIRED. "This is a massive risk." For years, Big Tech platforms have worked hard to create databases of known violent extremist content, known as hashing databases, which are shared across platforms to quickly and automatically remove such content from the internet.