Identifiability of the Flatbed Scanner and Its Products (Graphics Files and Printed Results)

This study addresses the ability to identify the specific original document, scanner or graphics file from which a scanned product (graphics file or printed result) was made. Contaminants in many types of paper are often reproduced by the scanner, allowing a correlation of the product to an original document. Further, Small Computer Systems Interface (SCSI) chain noise (interference) frequently produces a non-repeating series of marks allowing a graphics file to be correlated to a printed result. Photocopier-type defects from the scanner platen and internal components may also allow the correlation of a specific scanner to a printed result.