Techniques are available to secure documents such as bank notes using paper watermarks, security fibers, holograms, or special inks. The problem is that the use of these security techniques can be cost prohibitive. Most of these techniques either require special equipment to embed the security features, or are simply too expensive for an average consumer. Additionally, there are a number of applications in which it is desirable to be able to identify the technology, manufacturer, model, or even specific unit that was used to print
a given document.
The print quality defect known as banding in electrophotographic (EP ie LASER) printers helps to identify the model and manufacturer of the printer. Generally different printers have different sets of banding frequencies which are dependent upon brand and model. Using this banding frequencies printers are identified. In forensics if they are able to find the printer details then from that they can trace the dealer and retailer. This in will lead them to find the criminal they are lookin for.
Paper Title :: High-Capacity Data Hiding in Text Documents,
Authors:: Aravind K. Mikkilineni,George T. C. Chiu , Jan P. Allebach , Edward J. Delp
Source :: Purdue Sensor and Printer Forensics (PSAPF)
The goals of their work are to securely print and trace documents on low cost consumer printers such as inkjet and electrophotographic (laser) printers.
http://cobweb.ecn.purdue.edu/~prints/
a given document.
The print quality defect known as banding in electrophotographic (EP ie LASER) printers helps to identify the model and manufacturer of the printer. Generally different printers have different sets of banding frequencies which are dependent upon brand and model. Using this banding frequencies printers are identified. In forensics if they are able to find the printer details then from that they can trace the dealer and retailer. This in will lead them to find the criminal they are lookin for.
Paper Title :: High-Capacity Data Hiding in Text Documents,
Authors:: Aravind K. Mikkilineni,George T. C. Chiu , Jan P. Allebach , Edward J. Delp
Source :: Purdue Sensor and Printer Forensics (PSAPF)
The goals of their work are to securely print and trace documents on low cost consumer printers such as inkjet and electrophotographic (laser) printers.
http://cobweb.ecn.purdue.edu/~prints/
