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Combined Covert Data Embedding and Forensic Markings for Graphic Objects

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We introduce a method for combining the covert encoding of data in hardcopy using a steganographic halftone with the extraction of a microscopic print signature from around the outside of the halftone suitable for forensic levels of authentication. Outline models for the extracting a unique forensic signature include the input image, the edge-refined reference halftone, and scans of sample stegatones. The results for recovery of several printed samples are reported. An example with a 3mm character can reliably carry 32 bits of data and carry a forensic signature with a false positive rate of 7×10−21.

Document Type: Research Article

Publication date: 2012-01-01

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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