Black Hat Asia keynote: Grugq
photoshop expert guy here:
So in my opinion the photo has been 'shopped:
It looks as though the piece of the image with Kim Jun Il was taken separately and Photoshopped into the image with WJC… if that makes sense. Kim was not in the original photo (two separate images PSD together). Also I think the obviously weird thing is the magnolias on the ground are the same magnolia except with the second magnolia on the right was duplicated and FLIPPED. I'm not much of a photographer but the bizarre lighting is creating shadows that are either inexplicable or just not correct. Also highlights on the chairs are incorrect. The magnolia gave the subject a place to put his feet while being photographed (marker). There are weird streak marks indicating cloning. Hard pixels indicate cut, no blending.
multiple images, different scale and different lighting