"Printer steganography is produced by laser printers, including Brother, Canon, Dell, Epson, HP, IBM, Konica Minolta, Kyocera, Lanier, Lexmark, Ricoh, Toshiba and Xerox, where tiny yellow dots are added to each page. The dots are barely visible and contain encoded printer serial numbers and timestamps."
"Printer steganography is produced by laser printers, including Brother, Canon, Dell, Epson, HP, IBM, Konica Minolta, Kyocera, Lanier, Lexmark, Ricoh, Toshiba and Xerox, where tiny yellow dots are added to each page. The dots are barely visible and contain encoded printer serial numbers and timestamps."