Digital image authentication from thumbnails

We describe how to exploit the formation and storage of an embedded image thumbnail for image authentication. The creation of a thumbnail is modeled with a series of filtering operations, contrast adjustment, and compression. We automatically estimate these model parameters and show that these parameters differ significantly between camera manufacturers and photo-editing software. We also describe how this signature can be combined with encoding information from the underlying full resolution image to further refine the signature's distinctiveness.

• Type: Conference
• Year: 2010
• Where: MEDIAFORENSICS
• Authors: Eric Kee, Hany Farid
• Keywords: Embedded Image Thumbnail, Forensic Engineering, Image Authentication, MEDIAFORENSICS 2010, Model Parameters