Generative AI allows for the rapid and automatic generation of highly realistic audio, images, and videos (so-called deepfakes). The field of media forensics and digital provenance focus on detection and authentication of this content, thus helping in mitigating the potential risks. This workshop aims at bringing a heterogeneous group of specialists from academia, industry, and civil society together to discuss emerging threats, technologies, and mitigation strategies. The workshop will focus on the application of tools from computer vision, pattern recognition, and machine learning, as well as the development of novel approaches for verifying the integrity and tracing the origins of digital media, the creation of novel datasets for evaluation, large-scale evaluations of existing forensic techniques, and ethical/policy considerations around generative AI and forensic techniques.