8. A computer system comprising: at least one computing device including at least one component to enhance document security and fraud detection by: embedding information into an original document and subsequently determining the presence of the embedded information in a copy of the original document; computing a first set of candidate positions for embedding speckles into a digitized image based on information to be embedded, and for computing a second set of candidate positions for embedding ghost speckles into the digitized image based on the information to be embedded, wherein the second set of candidate positions are white areas of the original document and the ghost speckles are left white and act as a credibility control during subsequent specklemark detection, the digitized image having at least one image plane, the at least one image plane being represented by an image array having brightness data for a plurality of pixels, each of said pixels having at least one color component and a pixel position; and embedding the speckles into the digitized image to create a composite image.
8. A computer system comprising: at least one computing device including at least one component to enhance document security and fraud detection by: embedding information into an original document and subsequently determining the presence of the embedded information in a copy of the original document; computing a first set of candidate positions for embedding speckles into a digitized image based on information to be embedded, and for computing a second set of candidate positions for embedding ghost speckles into the digitized image based on the information to be embedded, wherein the second set of candidate positions are white areas of the original document and the ghost speckles are left white and act as a credibility control during subsequent specklemark detection, the digitized image having at least one image plane, the at least one image plane being represented by an image array having brightness data for a plurality of pixels, each of said pixels having at least one color component and a pixel position; and embedding the speckles into the digitized image to create a composite image. 9. The system of claim 8 , wherein the at least one component further enhances document security and fraud protection by: recomputing the first set of candidate positions for embedding speckles into the page image based on said information to be embedded, and for recomputing the second set of candidate positions for embedding ghost speckles into the page image based on said information to be embedded; geometrically aligning said suspect page image with the page image; determining at each black speckle position whether the suspect page image had a nearby black speckle; computing the number of black speckle positions for which that suspect page image had a black speckle nearby; determining at each ghost speckle position whether the suspect page image had a nearby black speckle; computing the number of ghost speckle positions for which that suspect page image had a black speckle nearby; and determining whether the suspect printed page possessed said information to be embedded.