1. A method of enhancing document security and detecting fraud, comprising: providing at least one computer system; embedding, using the at least one computer system, information into an original document and subsequently determining the presence of the embedded information in a copy of the original document, the embedding step including: providing, using the at least one computer system, a 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; computing, using the at least one computer system, a first set of candidate positions for embedding speckles into the digitized image based on information to be embedded; computing, using the at least one computer system, 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; and embedding, using the at least one computer system, the speckles into the digitized image to create a composite image.