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Forensic Document Examination Using Magnetic Imaging Techniques

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Magnetic materials have been used in documents for years. Most black and white copiers use magnetic toners to print, even ink jet technology is now capable of printing using magnetic ink. Today the ubiquitous distribution of high technology scanning and printing equipment enables the “casual” user to alter or make counterfeits of high value documents. The forensic community has traditionally relied on the examination of visible features in documents to identify the printing device and also to verify the document's authenticity. Magnetic technology can add hidden information to documents such as stock certificates, checks, airline tickets,identification cards or transit documents. A solution to forensics is magnetic imaging that can convert optically invisible magnetic patterns into an image, which can be then compared with an optical scan. Depending on the design of a security feature, if the magnetic image is identical to a visible picture, a document could be a counterfeit. We will address the issues related to the magnetic scanning of high value documents printed using different techniques. We will also show how magnetic imaging can provide valuable information in understanding alterations to high value documents.

Document Type: Research Article

Publication date: 2002-01-01

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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