1. A method of detecting steganography in a compressed digital image, comprising: extracting one or more neighboring joint density features from an image under scrutiny; decoding the image under scrutiny to a spatial domain; cropping the image to create a cropped image; encoding the cropped image; extracting one or more neighboring joint density features from the encoded cropped image; and detecting steganography in the image based on at least one difference in a neighboring joint density feature of the image and a neighboring joint density feature of the encoded cropped image.