Digital Image Authentication from Thumbnails

E. Kee and H. Farid

SPIE Symposium on Electronic Imaging, San Jose, CA, 2010

Paper    Bibtex

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.