Microsoft has published a new report examining techniques that can help verify the provenance of digital content – where an image or video came from, who created it and whether it has been tampered with. These so-called media integrity and authentication (MIA) methods include secure provenance (C2PA), imperceptible watermarking, and soft hash fingerprinting across images, audio and video. Microsoft co-founded Coalition for Content Provenance and Authenticity (C2PA) in 2021 alongside companies such as Adobe, Arm, BBC, Intel and Truepic. Its goal is to develop technical standards for certifying the source and history of media content and preventing disinformation, misinformation and online content fraud.