When Kate Isaacs clicked on the video, she couldn't believe what she was seeing: her and a stranger having sex. Her first thoughts were: Who is this man? Who is filming this? Damn, the video is on the Internet! Millions of women worldwide have knowingly or unknowingly become victims of deepfake porn - pornographic content created with the help of artificial intelligence. Due to rapid technological progress, anyone with a mobile phone and some pictures of the target can create and distribute deepfake porn using freely available apps. The real-world harm of imaged-based sexual abuse online is huge. Damage to reputation, career setbacks, threats of violence, depression, suicide. No one is safe. Anyone can be the next target. And yet it is almost impossible to protect yourself. "NZZ Format" talks to victims of deepfake porn, AI experts, campaigners, lawyers and producers of deepfake porn.