Perhaps the leaker didn’t realize that the digital camera he or she used — a Canon Rebel 300D — left digital fingerprints behind in every image. We downloaded a copy of the leak and took a look at the images with the open-source ExifTool, one of dozens of programs capable of reading the industry-standard EXIF digital photo metadata format. As the press reported, the camera’s serial number is in there, along with over 100 other facts including the date and time that the photos were taken and an assortment of photo-geek details about focus and lighting conditions.
Harry Potter and the Digital Fingerprints