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Data Hiding for Text Document in PDF File

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Part of the book series: Smart Innovation, Systems and Technologies ((SIST,volume 81))

Abstract

Among data hiding methods for documents, the spaces between words and paragraphs are popular features for embedding information. However, in order to avoid the visible distortions, the embedding capacity is limited to be small in conventional methods. In this paper, we regard a collection of space lengths as one dimensional feature vector and apply signal processing approaches for the vector to embed more information with less distortions. We also focus on the Portable Document Format (PDF) files and propose a new data hiding method for PDF files with large capacity. Considering the secrecy of the embedded information, a random permutation and dither modulation are introduced in the operation.

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Notes

  1. 1.

    http://www.geocities.co.jp/HeartLand-Gaien/7211/momo.html.

  2. 2.

    https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/.

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Acknowledgements

This research was partially supported by JSPS KAKENHI Grant Number JP16K00185.

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Correspondence to Minoru Kuribayashi .

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© 2018 Springer International Publishing AG

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Kuribayashi, M., Fukushima, T., Funabiki, N. (2018). Data Hiding for Text Document in PDF File. In: Pan, JS., Tsai, PW., Watada, J., Jain, L. (eds) Advances in Intelligent Information Hiding and Multimedia Signal Processing. IIH-MSP 2017. Smart Innovation, Systems and Technologies, vol 81. Springer, Cham. https://doi.org/10.1007/978-3-319-63856-0_47

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  • DOI: https://doi.org/10.1007/978-3-319-63856-0_47

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-63855-3

  • Online ISBN: 978-3-319-63856-0

  • eBook Packages: EngineeringEngineering (R0)

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